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ARS Home » Southeast Area » Florence, South Carolina » Coastal Plain Soil, Water and Plant Conservation Research » People & Locations » Gilbert Sigua

Gilbert Sigua
Coastal Plain Soil, Water and Plant Conservation Research
Research Soil Scientist

Phone: (843) 669-5203 ext. 105
Fax: (843) 669-6970

2611 W LUCAS ST
FLORENCE, SC 295011242
Projects
Improvement of Soil Management Practices and Manure Treatment/Handling Systems of the Southern Coastal Plain
In-House Appropriated (D)
  Accession Number: 431207
Managing Water Availability and Quality for Sustainable Agricultural Production and Conservation of Natural Resources in Humid Regions
In-House Appropriated (D)
  Accession Number: 432460

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Editorial to special issue "Innovative animal manure management for environmental protection, improved soil fertility and crop production" Reprint Icon ()
Ro, K.S., Szogi, A.A., Sigua, G.C. 2020. Editorial to special issue "Innovative animal manure management for environmental protection, improved soil fertility and crop production." In: Ro. K.S., Szogi, A.A., Sigua, G.C., editors. Innovative animal manure management for environmental protection, improved soil fertility and crop production. Switerland: MDI Books. p. ix-xi.
Efficacy of supplemental irrigation and nitrogen management on enhancing nitrogen availability and urease activity in soils with sorghum production Reprint Icon - (Peer Reviewed Journal)
Sigua, G.C., Stone, K.C., Bauer, P.J., Szogi, A.A. 2020. Efficacy of supplemental irrigation and nitrogen management on enhancing nitrogen availability and urease activity in soils with sorghum production. Sustainability. https://doi.org/10.3390/su12208358.
Feedstock choice, pyrolysis temperature and type influence biochar characteristics: a comprehensive meta-data analysis review Reprint Icon - (Peer Reviewed Journal)
Ippolito, J.A., Cui, L., Kammann, C., Wrage-Monnig, N., Estavillo, J.M., Fuertes-Mendizabal, T., Cayuela, M., Sigua, G.C., Novak, J.M., Spokas, K.A., Borchard, N. 2020. Feedstock choice, pyrolysis temperature and type influence biochar characteristics: a comprehensive meta-data analysis review. Biochar. https://doi.org/10.1007/s42773-020-00067-x.
Urease activity and nitrogen dynamics in highly weathered soils with designer biochars under corn cultivation Reprint Icon - (Peer Reviewed Journal)
Sigua, G.C., Novak, J.M., Watts, D.W., Myers Jr, W.T., Ducey, T.F., Stone, K.C. 2020. Urease activity and nitrogen dynamics in highly weathered soils with designer biochars under corn cultivation. Biochar Journal. https://doi.org/10.1007/s42773-020-00052-4.
Designer biochars: emerging waste management technology for agricultural productivity and soil remediation - (Peer Reviewed Journal)
Evaluating nitrogen management for corn production with supplemental irrigation on sandy soils of the Southeastern Coastal Plain region of the United States Reprint Icon - (Peer Reviewed Journal)
Sohoulande Djebou, D.C., Ma, L., Szogi, A.A., Sigua, G.C., Stone, K.C., Malone, R.W. 2020. Evaluating nitrogen management for corn production with supplemental irrigation on sandy soils of the Southeastern Coastal Plain region of the United States. Transactions of the ASABE. 63(3):731-740. https://doi.org/10.13031/trans.13885.
Innovative animal manure management for environmental protection, improved soil fertility and crop production Reprint Icon ()
Ro, K.S., Szogi, A.A., Sigua, G.C. 2020. Innovative animal manure management for environmental protection, improved soil fertility and crop production. Environments. Switzerland: MDI Books. 164 p. https://doi.org/10.3390/books978-3-03921-957-5.
Biochar affects essential elements of carrot taproots and lettuce leaves Reprint Icon - (Peer Reviewed Journal)
Olszyk, D., Shiroyama, T., Novak, J.M., Cantrell, K., Sigua, G.C., Watts, D.W., Johnson, M.G. 2020. Biochar affects essential elements of carrot taproots and lettuce leaves. Horticultural Science. 55(2):261-271. https://doi.org/10.21273/HORTSCI14421-19.
Nitrogen mineralization in a sandy soil amended with treated low-phosphorus broiler litter Reprint Icon - (Peer Reviewed Journal)
Szogi, A.A., Shumaker, P.D., Ro, K.S., Sigua, G.C. 2019. Nitrogen mineralization in a sandy soil amended with treated low-phosphorus broiler litter. Environments [MDPI]. 6(8):96. https://doi.org/10.3390/environments6080096.
Phytostabilization of Zn and Cd in mine soil using corn in combination with manure-based biochar and compost Reprint Icon - (Peer Reviewed Journal)
Sigua, G.C., Novak, J.M., Watts, D.W., Ippolito, J.A., Ducey, T.F., Johnson, M.G., Spokas, K.A. 2019. Phytostabilization of Zn and Cd in mine soil using corn in combination with manure-based biochar and compost. Environments. 6(6):69. https://doi.org/10.3390/environments6060069.
Designer biochars impact on corn grain yields, biomass production, and fertility properties of a highly-weathered ultisol Reprint Icon - (Peer Reviewed Journal)
Novak, J.M., Sigua, G.C., Ducey, T.F., Watts, D.W., Stone, K.C. 2019. Designer biochars impact on corn grain yields, biomass production, and fertility properties of a highly-weathered ultisol. Environments MDPI. 6:64-79. https://doi.org/10.3390/environments6060064.
Controlled-release nitrogen fertilizer improved lodging resistance and potassium and silicon uptake of direct-seeded rice Reprint Icon - (Peer Reviewed Journal)
Zhang, S., Yang, Y., Zhai, W., Tong, Z., Shen, T., Li, Y., Zhang, M., Sigua, G.C., Chen, J., Ding, F. 2019. Controlled-release nitrogen fertilizer improved lodging resistance and potassium and silicon uptake of direct-seeded rice. Journal of Agronomy and Crop Science. 59:1-8. https://doi.org/10.2135/cropsci2018.12.0765.
Biochar compost blends facilitate switchgrass growth in mine soils by reducing Cd and Zn bioavailability Reprint Icon - (Peer Reviewed Journal)
Novak, J.M., Ippolito, J.A., Watts, D.W., Sigua, G.C., Ducey, T.F., Johnson, M. 2019. Biochar compost blends facilitate switchgrass growth in mine soils by reducing Cd and Zn bioavailability. Biochar Journal. https://doi.org/10.1007/s42773-019-00004-7.
Subsurface clay soil application improved aggregate stability, nitrogen availability and organic carbon preservation in degraded Ultisols with cover crop mixtures Reprint Icon - (Peer Reviewed Journal)
Ye, R., Parajuli, B., Sigua, G.C. 2019. Subsurface clay soil application improved aggregate stability, nitrogen availability and organic carbon preservation in degraded Ultisols with cover crop mixtures. Soil Science Society of America Journal. https://doi.org/10.2136/sssaj2018.12.0496.
Potential water conservation using site-specific variable rate irrigation Reprint Icon - (Peer Reviewed Journal)
Stone, K.C., Bauer, P.J., Sigua, G.C. 2019. Potential water conservation using site-specific variable rate irrigation. Applied Engineering in Agriculture. 35(6):881-888. https://doi.org/10.13031/aea.13108.
Grain sorghum irrigation in the US Eastern Coastal Plain using variable rate irrigation - (Proceedings)
Stone, K.C., Sigua, G.C., Bauer, P.J. 2018. Grain sorghum irrigation in the US Eastern Coastal Plain using variable rate irrigation. In: Proceedings of 2018 Irrigation and Education Conference, December 3-7, 2018, Long Beach, California. p.1-10.
Biochar, soil and land-use interactions that reduce nitrate leaching and N2O emissions: A meta-analysis Reprint Icon - (Peer Reviewed Journal)
Borchard, N., Schirrmann, M., Cayuela, M.L., Kammann, C., Wrange-Monnig, N., Estavillo, J., Fuertes-Mendizabal, T., Sigua, G.C., Spokas, K.A., Ippolito, J., Novak, J.M. 2018. Biochar, soil and land-use interactions that reduce nitrate leaching and N2O emissions: A meta-analysis. Science of the Total Environment. 651:2354-2364. https://doi.org/10.1016/j.scitotenc.2018.10.060.
Biochar utilization for soil quality improvement, greenhouse gas reduction, metal and nutrient sequestration - (Abstract Only)
Novak, J.M., Sigua, G.C., Ippolito, J., Lentz, R.D., Van Pelt, R.S., Spokas, K.A., Sistani, K.R., Collins, H.P., Johnson, M.G., Pantuck, K. 2018. Biochar utilization for soil quality improvement, greenhouse gas reduction, metal and nutrient sequestration. U.S. Biochar Initiative Conference. p.13.
Remediation of an acidic mine spoil: Miscanthus biochar and lime amendment affects metal availability, plant growth and soil enzymatic activity Reprint Icon - (Peer Reviewed Journal)
Novak, J.M., Ippolito, J.A., Ducey, T.F., Watts, D.W., Spokas, K.A., Trippe, K.M., Sigua, G.C., Johnson, M.G. 2018. Remediation of an acidic mine spoil: Miscanthus biochar and lime amendment affects metal availability, plant growth and soil enzymatic activity. Chemosphere. 205:709-718. https://doi.org/10.1016/j.chemosphere.2018.04.107.
Ameliorating effects of designer biochars in a hard-setting subsoil layer: soil fertility and plant biomass - (Abstract Only)
Nitrogen mineralization and nitrous oxide emissions in a sandy soil amended with low-phosphorus broiler litter - (Abstract Only)
Biomass and nitrogen-use efficiency of grain sorghum (Sorghum bicolor L.) with nitrogen and supplemental irrigation in Coastal Plain Region, USA Reprint Icon - (Peer Reviewed Journal)
Sigua, G.C., Stone, K.C., Bauer, P.J., Szogi, A.A. 2018. Biomass and nitrogen-use efficiency of grain sorghum (Sorghum bicolor L.) with nitrogen and supplemental irrigation in Coastal Plain Region, USA. Agronomy. https://doi.org/10.2134/agronj2017.09.0533.
Recycled agricultural wastes: biochars multifunctional role in agriculture and environment - (Abstract Only)
Sigua, G.C., Novak, J.M. 2018. Recycled agricultural wastes: biochars multifunctional role in agriculture and environment. In: Proceedings of World Conference on Ecology, March 19-20, 2018, Berlin, Germany. p. 38-39.
Supplemental irrigation for grain sorghum production in the US Eastern Coastal Plain Reprint Icon - (Peer Reviewed Journal)
Stone, K.C., Sigua, G.C., Bauer, P.J. 2018. Supplemental irrigation for grain sorghum production in the US Eastern Coastal Plain. Applied Engineering in Agriculture. 34(2):395-402. https://doi.org/10.13031/aea.12615.
Manure-derived biochars for use as a phosphorus fertilizer in cotton production - (Peer Reviewed Journal)
Ducey, T.F., Bauer, P.J., Sigua, G.C., Hunt, P.G., Miller, J.O., Cantrell, K.B. 2018. Manure-derived biochars for use as a phosphorus fertilizer in cotton production. Journal of Cotton Science. 21:259-264. Available: http://www.cotton.org/journal/2017-21/4/upload/JCS21-259.pdf
Phosphorus dynamics and phosphatase acitivity of soils under corn production with supplemental irrigation in humid coastal plain region, USA Reprint Icon - (Peer Reviewed Journal)
Sigua, G.C., Stone, K.C., Bauer, P.J., Szogi, A.A. 2017. Phosphorus dynamics and phosphatase acitivity of soils under corn production with supplemental irrigation in humid coastal plain region, USA. Nutrient Cycling in Agroecosystems. 109(3):249-267. https://doi.org/10.1007/s10705-017-9882-6.
Conservation agriculture improves yield and reduces weeding activity in sandy soils of Cambodia Reprint Icon - (Peer Reviewed Journal)
Edralin, D.L., Sigua, G.C., Reyes, M.R., Mulvaney, M.J., Andrews, S.S. 2017. Conservation agriculture improves yield and reduces weeding activity in sandy soils of Cambodia. Agronomy for Sustainable Development. 37:52. https://doi.org/10.1007/s13593-017-0461-7.
Effects of crop rotations and intercropping on soil health ()
Sigua, G.C. 2018. Effects of crop rotations and intercropping on soil health. In: Reicosky, D., editor. Managing Soil Health for Sustainable Agriculture. Volume 2. Cambridge, UK: Burleigh Dobbs Science Publishing Limited. p. 1-27.
Conservation agriculture in high tunnels: soil health and profit enhancement ()
Sigua, G.C. 2017. Conservation agriculture in high tunnels: soil health and profit enhancement. Sustainable Crop Production Intensification (SCPI) FAO Online Bulletin. 71-72: Available: https://dgroups.org/?a8z90mrp.0.
Biochar research activities and their relation to development and environmental quality: A meta-analysis - (Peer Reviewed Journal)
Mehmood, K., Chavez Garcia, E., Schirrmann, M., Ladd, B., Kammann, C., Wrage-Monnig, N., Siebe, C., Estavillo, J.M., Fuertes-Mendizabal, T., Cayuela, M., Sigua, G.C., Spokas, K.A., Cowie, A.L., Novak, J.M., Ippolito, J.A., Borchard, N. 2017. Biochar research activities and their relation to development and environmental quality: A meta-analysis. Agronomy for Sustainable Development. doi:10.1007/s13593-017-0430-1.
Impact of irrigation scheduling on pore water nitrate and phosphate in coastal plains soils with corn production - (Peer Reviewed Journal)
Sigua, G.C., Stone, K.C., Bauer, P.J., Szogi, A.A., Shumaker, P.D. 2017. Impact of irrigation scheduling on pore water nitrate and phosphate in coastal plains soils with corn production. Agricultural Water Management. 186:75-85.
Soil carbon and nitrogen losses following deforestation in Ethiopia - (Peer Reviewed Journal)
Berihu, T., Girmay, G., Sebhatleab, M., Berhane, E., Zenebe, A., Sigua, G.C. 2016. Soil carbon and nitrogen losses following deforestation in Ethiopia. Agronomy for Sustainable Development. doi:10.1007/s13593-016-0408-4.
Biosolids and dredged materials: alternative sources of nutrients for crop productivity and sustainability of pasture-based agroecosystem - (Proceedings)
Sigua, G.C. 2016. Biosolids and dredged materials: alternative sources of nutrients for crop productivity and sustainability of pasture-based agroecosystem. In Sosa, E.S., Castillo, I.O., Escareno, H.I, Garcia, A. J. and Betancourt, M.G. (eds.). Aspectos De Agricultural Organica, June 16-17, 2016, Puerto Vallarto, Mexico. p. 23-45.
Nitrate leaching, water-use efficiency and yield of corn with different irrigation and nitrogen management systems in coastal plains, USA Reprint Icon - (Peer Reviewed Journal)
Sigua, G.C., Stone, K.C., Bauer, P.J., Szogi, A.A. 2016. Nitrate leaching, water-use efficiency and yield of corn with different irrigation and nitrogen management systems in coastal plains, USA. WIT Transactions on Ecology and the Environment. 203:159-170. https://doi.org/10.2495/EID160151.
Dynamics of soil carbon, nitrogen and soil respiration in farmer’s field with conservation agriculture Siem Reap, Cambodia - (Peer Reviewed Journal)
Edralin, D.I., Sigua, G.C., Reyes, M.R. 2016. Dynamics of soil carbon, nitrogen and soil respiration in farmer’s field with conservation agriculture Siem Reap, Cambodia. International Journal of Plant and Soil Science. 11(1):1-13.
Enhancing cleanup of heavy metal-polluted landfill soils and improving soil microbial activity using green technology with ferrous sulfate - (Peer Reviewed Journal)
Sigua, G.C., Celestino, A., Alberto, R.T., Paz-Alberto, A.M., Stone, K.C. 2016. Enhancing cleanup of heavy metal-polluted landfill soils and improving soil microbial activity using green technology with ferrous sulfate. International Journal of Environmental Protection. 6(1):97-103.
Irrigation management using an expert system, soil water potentials, and vegetative indices for spatial applications - (Peer Reviewed Journal)
Stone, K.C., Bauer, P.J., Sigua, G.C. 2016. Irrigation management using an expert system, soil water potentials, and vegetative indices for spatial applications. Transactions of the ASABE. 59(3):941-948.
Impact of switchgrass biochars with supplemental nitrogen on carbon-nitrogen mineralization in highly weathered Coastal Plain Ultisols - (Peer Reviewed Journal)
Sigua, G.C., Novak, J.M., Watts, D.W., Szogi, A.A., Shumaker, P.D. 2015. Impact of switchgrass biochars with supplemental nitrogen on carbon-nitrogen mineralization in highly weathered Coastal Plain Ultisols. Chemosphere. 145:135-141.
Assessing diversity and phytoremediation potential of mangroves for copper contaminated sediments in Subic Bay, Philippines - (Peer Reviewed Journal)
Paz-Alberto, A.M., Sigua, G.C., Vizmonte, J.L. 2015. Assessing diversity and phytoremediation potential of mangroves for copper contaminated sediments in Subic Bay, Philippines. International Journal of Plant, Animal, and Environmental Sciences. 5(4):50-59.
Assessing diversity and phytoremediation potential of seagrass in tropical region - (Peer Reviewed Journal)
Paz-Alberto, A., Pakaigue-Hechanova, M., Sigua, G.C. 2015. Assessing diversity and phytoremediation potential of seagrass in tropical region. International Journal of Plant, Animal, and Environmental Sciences. 5(4):24-35.
Impact of changing land-use and hydrology on soil organic carbon dynamics in beef cattle agroecosystem - (Abstract Only)
Soil carbon and soil respiration in conservation agriculture with vegetables in Siem Reap, Cambodia - (Abstract Only)
Soil chemical changes of coastal plains ultisols with winter wheat: contrasting effects of sorghum biochars and sorghum residues - (Abstract Only)
Biochars multifunctional role as a novel technology in the agricultural, environmental, and industrial sectors Reprint Icon - (Peer Reviewed Journal)
Novak, J.M., Ro, K.S., Ok, Y.S., Sigua, G.C., Spokas, K.A., Uchimiya, S.M., Bolan, N. 2016. Biochars multifunctional role as a novel technology in the agricultural, environmental, and industrial sectors. Chemosphere. 142:1-3.
Biochars impact on water infiltration and water quality through a compacted subsoil layer - (Peer Reviewed Journal)
Novak, J.M., Sigua, G.C., Watts, D.W., Cantrell, K., Shumaker, P.D., Szogi, A.A., Johnson, M., Spokas, K.A. 2016. Biochars impact on water infiltration and water quality through a compacted subsoil layer. Chemosphere. 142:160-167.
Efficacies of designer biochars in improving biomass and nutrient uptake of winter wheat grown in a hard setting subsoil layer Reprint Icon - (Peer Reviewed Journal)
Sigua, G.C., Novak, J.M., Watts, D.W., Johnson, M.G., Spokas, K.A. 2015. Efficacies of designer biochars in improving biomass and nutrient uptake of winter wheat grown in a hard setting subsoil layer. Chemosphere. 142:176-183.
Ameliorating soil chemical properties of a hard setting subsoil layer in coastal plain USA with different designer biochars Reprint Icon - (Peer Reviewed Journal)
Sigua, G.C., Novak, J.M., Watts, D.W. 2015. Ameliorating soil chemical properties of a hard setting subsoil layer in coastal plain USA with different designer biochars. Chemosphere. 142:168-175.
Plant macro- and micronutrient dynamics in a biochar-amended wetland muck - (Peer Reviewed Journal)
Novak, J.M., Sigua, G.C., Spokas, K.A., Hunt, P.G., Glaz, B.S., Watts, D.W., Cantrell, K.B., Busscher, W.J. 2014. Plant macro- and micronutrient dynamics in a biochar-amended wetland muck. Water, Air, and Soil Pollution. Doi 10.1007/s11270-014-2228-y.
Soils under conservation agriculture with vegetables in Siem Reap, Cambodia - (Abstract Only)
Urban conservation agriculture - (Abstract Only)
Crop yield responses to a hardwood biochar across varied soils and climate conditions - (Abstract Only)
Increasing biomass of winter wheat using sorghum biochars - (Peer Reviewed Journal)
Sigua, G.C., Stone, K.C., Hunt, P.G., Cantrell, K.B., Novak, J.M. 2014. Increasing biomass of winter wheat using sorghum biochars. Agronomy for Sustainable Development. 35:739-748.
Contrasting effects of sorghum biochars and sorghum residues on soil chemical changes of coastal plains ultisols with winter wheat - (Peer Reviewed Journal)
Sigua, G.C., Hunt, P.G., Stone, K.C., Cantrell, K.B., Novak, J.M. 2014. Contrasting effects of sorghum biochars and sorghum residues on soil chemical changes of coastal plains ultisols with winter wheat. Soil Science. 179(8):383-392.
Wheat straw yield, nutrient uptake and soil chemical changes in two coastal plains ultisols amended with uncharred and pyrolyzed sorghum residues - (Abstract Only)
Assessing groundwater phosphorus in forage-based agroecosystem with cow-calf operation - (Abstract Only)
Phosphorus dynamics and management in forage systems with cow-calf operation - (Peer Reviewed Journal)
Sigua, G.C. 2015. Phosphorus dynamics and management in forage systems with cow-calf operation. Sustainable Agriculture Reviews. DOI 10.1007/978-3-319-16742-8_2.
Efficacy of biochar in improving root growth and water holding capacity of hard setting subsoil layer in coastal plains USA - (Abstract Only)
Carbon mineralization in two ultisols amended with different sources and particle sizes of pyrolyzed biochar - (Peer Reviewed Journal)
Sigua, G.C., Novak, J.M., Watts, D.W., Cantrell, K.B., Shumaker, P.D., Szogi, A.A., Johnson, M.G. 2014. Carbon mineralization in two ultisols amended with different sources and particle sizes of pyrolyzed biochar. Chemosphere. 103:313-321.
Groundwater phosphorus in forage-based landscape with cow-calf operation - (Peer Reviewed Journal)
Sigua, G.C., Chase, C.C. 2014. Groundwater phosphorus in forage-based landscape with cow-calf operation. Environmental Monitoring and Assessment. 186:1317-1326.
Biochar impact on improving root growth and water retention capacity in Norfolk hard setting subsoil layer - (Abstract Only)
Improving yield and protein content of forages under flooded condition - (Abstract Only)
Soil-extractable phosphorus and phosphorus saturation threshold in beef cattle pastures as affected by grazing management and forage type - (Peer Reviewed Journal)
Sigua, G.C., Chase, C.C., Albano, J.P. 2013. Soil-extractable phosphorus and phosphorus saturation threshold in beef cattle pastures as affected by grazing management and forage type. Environmental Science and Pollution Research. 21(3):1691-1700.
Carbon mineralization in two ultisols: effects of sources and particle sizes of Pyrolyzed Biochar - (Abstract Only)
Phytoremediation of Pb in the sediment of a mangrove ecosystem - (Peer Reviewed Journal)
Paz-Alberto, A.M., Celestino, A.B., Sigua, G.C. 2013. Phytoremediation of Pb in the sediment of a mangrove ecosystem. Journal of Soils and Sediments. 14(1):251-258.
Genetic diversity and geographical distribution of indigenous soybean-nodulating Bradyrhizobia in the United States - (Peer Reviewed Journal)
Shiro, S., Matsuura, S., Saiki, R., Sigua, G.C., Yamamoto, A., Umehara, Y., Hayashi, M., Saeki, Y. 2013. Genetic diversity and geographical distribution of indigenous soybean-nodulating Bradyrhizobia in the United States. Applied and Environmental Microbiology. 79(12):3610-3618.
Nitrogen recovery and agronomic efficiency of forages with nitrogen fertilization under flooded condition - (Peer Reviewed Journal)
Sigua, G.C., Williams, M.M., Chase, C.C., Grabowski, J., Kongchum, M. 2013. Nitrogen recovery and agronomic efficiency of forages with nitrogen fertilization under flooded condition. Agricultural Sciences. 4(3):138-148.
Phytoremediation: A green technology to remove environmental pollutants - (Peer Reviewed Journal)
Paz-Alberto, A.M., Sigua, G.C. 2013. Phytoremediation: A green technology to remove environmental pollutants. American Journal of Climate Change. (2):71-86.
Impacts of mixed farms on water quality of Pinhal River sub-basin, Santa Catarina - (Peer Reviewed Journal)
Yield and uptake of bahiagrass under flooded environment as affected by nitrogen fertilization - (Peer Reviewed Journal)
Sigua, G.C., Williams, M., Chase, C.C., Albano, J.P., Kongchum, M. 2012. Yield and uptake of bahiagrass under flooded environment as affected by nitrogen fertilization. Agricultural Sciences. 3(4):491-500.
Effect of flooding duration and nitrogen fertilization on yield and protein content of three forage species - (Peer Reviewed Journal)
Sigua, G.C., Williams, M., Grabwoski, J., Chase, C., Kongchum, M. 2012. Effect of flooding duration and nitrogen fertilization on yield and protein content of three forage species. Agronomy Journal. 104:791-798.
Absence of negative environmental effects of increased soil P levels in cattle congregation zones - (Peer Reviewed Journal)
Sigua, G.C., Coleman, S.W., Chase, C.C., Albano, J. 2012. Absence of negative environmental effects of increased soil P levels in cattle congregation zones. Agronomy for Sustainable Development. 32:693-701.
Evaluation of environmental contract adjustment to pig production in Pinhal River Sub-basin - (Peer Reviewed Journal)
Palhares, J.C., Guidoni, A., Steinmetz, R.L., Mulinari, M., Sigua, G.C. 2012. Evaluation of environmental contract adjustment to pig production in Pinhal River Sub-basin. Ambiente & Aqua – An Interdisciplinary Journal of Applied Science. 6(3):86-97.
Quantifying phosphorus levels in landscapes associated with Bahiagrass-based pastures and beef cattle - (Abstract Only)
Sigua, G.C., Chase, C.C., Jr. 2011. Quantifying phosphorus levels in landscapes associated with Bahiagrass-based pastures and beef cattle [abstract]. ASA, CSSA, and SSSA International Meeting. Paper No. 77-30.
Assessing phytoremediation potentials of selected tropical plants for acrylamide - (Peer Reviewed Journal)
Paz-Alberto, A.M., De Dios, M.J., Alberto, R.T., Sigua, G.C. 2011. Assessing phytoremediation potentials of selected tropical plants for acrylamide. Journal of Soils and Sediments. 11:1190-1198.
Sustainable cow-calf operations and water quality ()
Sigua, G.C. 2011. Sustainable cow-calf operations and water quality. In: Lichtfouse, E., Hamelin, M., Navarrete, M. and Debaeke, P., editors. Sustainable Agriculture. Volume 2. New York:Springer. p. 833-856.
Soil organic carbon under pasture management ()
Franzluebbers, A.J., Owens, L.B., Sigua, G.C., Cambardella, C.A., Haney, R.L. 2012. Soil organic carbon under pasture management. In: Liebig, M.A., Franzluebbers, A.J., Follett, R.F., editors. Managing Agricultural Greenhouse Gases: Coordinated Agricultural Research through GRACEnet to Address our Changing Climate. Amsterdam, Netherlands: Elsevier. p. 93-110.
Regional distribution of soil phosphorus across congregation-grazing zones of forage-based pastures with cow-calf operations in Florida - (Peer Reviewed Journal)
Sigua, G.C., Myer, R.O., Coleman, S.W., Mackowiak, C., Adjei, M., Chase, C.C., Albano, J.P. 2011. Regional distribution of soil phosphorus across congregation-grazing zones of forage-based pastures with cow-calf operations in Florida. Journal of Environmental Protection. 2(3):408-417.
Regionalized levels of soil phosphorus and phosphorus saturation in beef cattle pastures with and without grazing - (Abstract Only)
Sigua, G.C., Myer, R.O., Mackowiak, C.L., Coleman, S.W., Chase, C.C. 2010. Regionalized levels of soil phosphorus and phosphorus saturation in beef cattle pastures with and without grazing [abstract]. ASA, CSSA, and SSSA International Meeting. Paper No. 51-4.
Recycling biosolids and lake-dredged materials to pasture-based animal agriculture: Alternative nutrient sources for forage productivity and sustainability. ()
Sigua, G.C. 2010. Recycling biosolids and lake-dredged materials to pasture-based animal agriculture: Alternative nutrient sources for forage productivity and sustainability. In: Lichtfouse, E., Navarrete, M., Debaeke, P., Souchere, V. and Alberola, C., editors. Sustainable Agriculture. Volume 1. New York:Springer. p. 495-505.
Field sampling and travel report Reprint Icon ()
Sigua, G.C. 2010. Field sampling and travel report. In: Activities document - January/August 2009 Document II - Individual Activities Researchers from USDA-ARS and U.S. Forest Service. EMBRAPA-LABEX, Brazil. p. 28-33.
Changes in Population Occupancy of Bradyrhizobia under Diffrent Temperature Regimes - (Peer Reviewed Journal)
Saeki, Y., Ozumi, S., Yamamoto, A., Yamakawa, T., Sigua, G.C. 2010. Changes in Population Occupancy of Bradyrhizobia under Diffrent Temperature Regimes. Microbes and Environments. 25(4):309-312.
Managing forage-based cow-calf operations in subtropics: Implication to surface and ground water quality - (Proceedings)
Sigua, G.C., Coleman, S.W. 2010. Managing forage-based cow-calf operations in subtropics: Implication to surface and ground water quality. Proceedings of 19th World Congress of Soil Science, August 1-6, 2010, Brisbane, Australia. p. 94-97.
Sustainable cow-calf operations and water quality: A review - (Peer Reviewed Journal)
Sigua, G.C. 2010. Sustainable cow-calf operations and water quality: A review. Agronomy for Sustainable Development. 30(3):631-648.
Managing Forage-Based Cow-Calf Operations in Subtropics: Implication to Surface and Ground Water Quality - (Proceedings)
Spatial distribution of soil phosphorus and herbage mass in beef cattle pastures: Effects of slope aspect and slope position - (Peer Reviewed Journal)
Sigua, G.C., Coleman, S.W., Albano, J.P., Williams, M.J. 2010. Spatial distribution of soil phosphorus and herbage mass in beef cattle pastures: Effects of slope aspect and slope position. Nutrient Cycling in Agroecosystems. 89:59-70.
Managing Cow-Calf Operations: Implication to Nitrogen Level in Surface and Ground Water ()
Sigua, G.C., Coleman, S.W., Chase, C.C. 2010. Managing cow-calf operations: Implication to nitrogen level in surface and ground water. The Florida Cattleman and Livestock Journal. 74(8):40-44.
Impact of Livestock in the Water Quality of Pinhal River Sub-Basin, Santa Catarina State-Brazil - (Proceedings)
Palhares, J.C., Antonio, G.L., Jalusa, K.D., Ricardo, S.L., Magda, M.R., Jacqueline, K.B., Luciane, C., Gustavo, P., Sigua, G.C. 2010. Impact of livestock in the water quality of Pinhal River Sub-basin, Santa Catarina State-Brazil. 21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings, February 21-24, 2010, Universidad EARTH, Costa Rica.
Evaluation of Adjustment Environmental Contract to Pig Production in Pinhal River Sub-Basin - (Proceedings)
Palhares, J.C., Antonio, G.L., Jalusa, K.D., Ricardo, S.L., Magda, M.R., Jacqueline, K.B., Luciane, C., Gustavo, P., Sigua, G.C. 2010. Evaluation of adjustment environmental contract to pig production in Pinhal River Sub-basin. 21st Century Watershed Technology: Improving Water Quality and Environment Conference Proceedings,February 21-24, 2010, Universidad EARTH, Costa Rica.
Spatial Distribution of Soil Carbon in Pastures with Cow-Calf Operation: Effects of Slope Aspect and Slope Position - (Peer Reviewed Journal)
Sigua, G.C., Coleman, S.W. 2010. Spatial distribution of soil carbon in pastures with cow-calf operation: Effects of slope aspect and slope position. Journal of Soils and Sediments. 10(2):240-247.
Microbiological quality assessment of watershed associated with animal-based agriculture in Santa Cataroma, Brazil - (Peer Reviewed Journal)
Sigua, G.C., Palhares, J., Kich, J., Mulinari, M., Mattei, R., Klein, J., Muller, S. 2010. Microbiology quality assessment of watershed associated with animal-based agriculture in Santa Catarina, Brazil. Journal of Water Air and Soil Pollution. 210:307-316.
Quantifying phosphorus levels in soils, plants, surface water and shallow groundwater associated with bahiagrass-based pastures - (Peer Reviewed Journal)
Sigua, G.C., Hubbard, R.K., Coleman, S.W. 2009. Quantifying phosphorus levels in soils, plants, surface water and shallow groundwater associated with bahiagrass-based pastures. ESPR-Environmental Science and Pollution Research Journal. 17:210-219.
Long term effect of higher soil penetrometer resistance in cow congregation zone: Implication on soils and forage quality - (Peer Reviewed Journal)
Sigua, G.C., Coleman, S.W. 2009. Long-term effect of cow congregation zone on soil penetrometer resistance: Implication on soils and forage quality. Agronomy for Sustainable Development Journal. 29:517-523.
Beef Cattle Pasture to Wetland Reconversion: Impact on Soil Organic Carbon and Phosphorus Dynamics - (Peer Reviewed Journal)
Sigua, G.C., Coleman, S.W., Albano, J. 2009. Beef cattle pasture to wetland reconversion: Impact on soil organic carbon and phosphorus dynamics. Ecological Engineering. 35: 1231-1236.
Nitrogen in soils, plants, surface water and shallow groundwater in a bahiagrass pasture of southern Florida, USA - (Peer Reviewed Journal)
Sigua, G.C., Hubbard, R.K., Coleman, S.W., Williams, M. 2010. Nitrogen in soils, plants, surface water and shallow groundwater in a bahiagrass pasture of southern Florida, USA. Nutrient Cycling in Agroecosystems. 86(2):175-187.
Changes in Soil Carbon and Phosphorus Associated with Conversion of Beef Cattle Pasture to Wetland ()
Sigua, G.C., Coleman, S.W. 2009. Changes in soil carbon and phosphorus associated with conversion of beef cattle pasture to wetland. The Florida Cattleman and Livestock Journal.73(6):42-45.
Quantifying soil organic carbon in forage-based cow-calf congregation-grazing zone interface - (Peer Reviewed Journal)
Sigua, G.C., Coleman, S.W., Albano, J.P. 2009. Quantifying soil organic carbon in forage-based cow-calf congregation-grazing zone interface. Nutrient Cycling in Agroecosystems Journal. 85:215-223.
Improving Yield and Nutrient Uptake Potentials of japonica and indica Rice Varieties with Nitrogen Fertilization - (Peer Reviewed Journal)
Prudente, J.A., Sigua, G.C., Kongchum, M., Prudente, A.D. 2009. Improving yield and nutrient uptake potentials of japonica and indica rice varieties with nitrogen fertilization. World Journal of Agricultural Sciences. 4(3):326-332.
Recycling biosolids and lake-dredged materials to pasture-based animal agriculture: Alternative nutrient sources for forage productivity and sustainability - (Peer Reviewed Journal)
Sigua, G.C. 2008. Recycling biosolids and lake-dredged materials to pasture-based animal agriculture: Alternative nutrient sources for forage productivity and sustainability. Agronomy for Sustainable Development. 29(1):143-160.
Sustainable management of nutrients in foraged-based pasture soils: Effect on animal congregation sites ()
Sigua, G.C. 2008. Sustainable management of nutrients in foraged-based pasture soils: Effect on animal congregation sites. In: Annual Report S-1032: Improving the Sustainability of Livestock and Poultry Production in the United States. USDA-CSREES National Facilitation Project Livestock and Poultry. p. 4.
Assessing the efficacy of dredged materials: Pasture establishment and forage productivity ()
Sigua, G.C. 2008. Assessing the efficacy of dredged materials: Pasture establishment and forage productivity. In: Annual Report S-1032: Improving the Sustainability of Livestock and Poultry Production in the United States. USDA-CSREES National Facilitation Project Livestock and Poultry. 5 pp.
From Wetland to Beef Cattle Pasture then to Wetland and Beyond: Impact on Soil Nutrient Dymamics and Environment - (Abstract Only)
Managing beef cattle operations to protect lakes and rivers ()
Sigua, G.C. 2008. Managing beef cattle operations to protect lakes and rivers. The Florida Cattleman and Livestock Journal. 72(9):86-88.
Kriging analysis of soil properties: Implication to landscape management and productivity improvement - (Peer Reviewed Journal)
Sigua, G.C., Hudnall, W.H. 2008. Kriging analysis of soil properties: Implication to landscape management and productivity improvement. Journal of Soils and Sediments. 8(3):193-202.
Phytoremediation Potential of Lead-Contaminated Soil Using Tropical Grasses - (Abstract Only)
Sigua, G.C., Paz-Alberto, A.M. 2008. Phytoremediation Potential of Lead-Contaminated Soil Using Tropical Grasses [abstract]. Florida Scientist. 71(1): 1-6.
Levels of Nitrogen in Soils, Plants and Shallow Groundwater Beneath Bahiagrass-Based Pastures with Cow-Calf Operations - (Abstract Only)
Sigua, G.C., Hubbard, R.K., Coleman, S.W. 2008. Levels of Nitrogen in Soils, Plants and Shallow Groundwater Beneath Bahiagrass-Based Pastures with Cow-Calf Operations [abstract]. American Society of Agronomy Branch Meeting. Dallas, Texas. February 3-5, 2008. CD-ROM Agronomy/2008.
Assessing Potential Soil Organic Carbon Sequestration in Forage-Based Cow-Calf Congregation Sites and Adjoining Pastures - (Abstract Only)
Microbiological Water Quality Assessment of Watershed Associated with Swine Production in Santa Catarina, Brazil - (Abstract Only)
Palhares, J., Muller, S., Mattei, R.M., Kich, J.D., Sigua, G.C. 2007. Microbiological Water Quality Assessment of Watershed Associated with Swine Production in Santa Catarina, Brazil [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts. http://a-c-s.confex.com/crops/2007am/s11/extra/index.cgi (user name: 34252; password: 336765
Phytoextraction of lead-contaminanted soil using Vetiver grass (Vetiveria Zizanioides L.), Cogongrass (Imperata cylindrica L.) and Caraboagrass (Paspalum conjugatum L.) - (Peer Reviewed Journal)
Paz-Alberto, A.M., Sigua, G.C., Bellrose, G.B., Prudente, J.A. 2007. Phytoextraction of lead-contaminated soil using Vetiver grass (Vetiveria zizaniodes L.), Cogongrass (Imperata cylindrica L.) and Carabaograss (Paspalum conjugatum L.). Environmental Science and Pollution Research. 14(7):505-509.
PHYTOREMEDIATON POTENTIALS OF SELECTED TROPICAL PLANTS FOR ETHIDIUM BROMIDE - (Peer Reviewed Journal)
Uera, R.B., Paz-Alberto, A.M., Sigua, G.C. 2007. Phytoremediaton potentials of selected tropical plants for ethidium bromide. Environmental Science and Pollution Research. 14(7): 498-504.
Properly managed forage-based cow-calf operations in south Central Florida are environmentally friendly ()
Sigua, G.C., Coleman, S.W., Williams, M.J. 2007. Properly managed forage-based cow-calf operations in south Central Florida are environmentally friendly. USDA-Agricultural Research Service, STARS Field Day Book, Brooksville, Florida. p. 23-27.
Cattle congregation sites do not appear to impact soil nutrients build-up ()
Sigua, G.C., Coleman, S.W., Williams, M.J. 2007. Cattle congregation sites do not appear to impact soil nutrients build-up. USDA-Agricultural Research Service STARS Field Day Book, Brooksville, Florida. p. 29-31.
Water quality of selected lakes associated with beef cattle pastures in Central Florida ()
Sigua, G.C., Coleman, S.W., Williams, M.J. 2007. Water quality of selected lakes associated with beef cattle pastures in Central Florida. USDA-Agricultural Research Service STARS Field Day Book, Brooksville, Florida. p. 33-35.
Using lake dredged material to enhance pasture establishment ()
Sigua, G.C., Coleman, S.W. 2007. Using lake dredged material to enhance pasture establishment. USDA-Agricultural Research Service STARS Field Day Book, Brooksville, Florida. p. 37-41.
Alternative grasses for home lawns: Water and fertilizer needs ()
Sigua, G.C. 2007. Alternative grasses for home lawns: Water and fertilizer needs. Hernando County Groundwater Guardian White Paper, Brooksville, Florida. 15 p.
Impact of Cattle Congregation Sites on Soil Nutrients and Soil Compaction. - (Abstract Only)
Sigua, G.C., Albano, J.P., Coleman, S.W. 2007. Impact of Cattle Congregation Sites on Soil Nutrients and Soil Compaction [abstract]. Florida Scientist.70(1):12-18.
Sustainable management of nutrients in forage-based pasture soils: effect of animal congregation sites. - (Peer Reviewed Journal)
Sigua, G.C., Coleman, S.W. 2007. Sustainable management of nutrients in forage-based pasture soils: effect of animal congregation sites. Journal of Soils and Sediments.6(4):249-253.
AGRICULTURAL EFFICANCY OF CARBONATIC LAKE-DREDGED MATERIALS IN ENHANCING PASTURE ESTABLISHMENT - (Abstract Only)
Sigua, G.C., Coleman, S.W., Albano, J.P. 2006. Agricultural efficancy of carbonatic lake-dredged materials in enhancing pasture establishment. ASA-CSSA-SSSA Annual Meeting Abstracts. ASA-CSSA-SSSA CD 2006.
Gypsum-Water Management Interactions on the Survival, Yield, and Protein Content of Selected Species of Marsh Vegetation - (Proceedings)
Sigua, G.C., Hudnall, W.H. and Prudente, J. 2008. Gypsum-water management interactions on the survival, yield, and protein content of selected species of marsh vegetation. In Vyapari, S., editor. Proceedings of the 33rd Annual Conference on Ecosystem Restoration and Creation, Institute of Florida Studies, Hillsborough Community College, Plant City, Florida. p. 80-90.
SOIL PROFILE DISTRIBUTION OF PHOSPHORUS AND OTHER NUTRIENTS FOLLOWING WETLAND CONVERSION TO BEEF CATTLE PASTURE - (Peer Reviewed Journal)
Sigua, G.C., Kang, W., Coleman, S.W. 2006. Soil profile distribution of phosphorus and other nutrients following wetland conversion to beef cattle pasture. Journal of Environmental Quality. 35:2374- 2382.
Wetland Conversion to Beef Cattle Pasture: Effect on Soil Phosphorus ()
Sigua, G.C., Coleman, S.W. 2006. Wetland conversion to beef cattle pasture: Effect on soil phosphorus. The Florida Cattleman and Livestock Journal. 71(2): 56-60.
FROM WETLAND TO BEEF CATTLE PASTURE: IMPACT ON SOIL NUTRIENT DYNAMICS - (Abstract Only)
Sigua, G.C., Kang, W., Coleman, S.W., Albano, J.P. 2006. From wetland to beef cattle pasture: impact on soil nutrient dynamics. Florida Scientist.69(1):26-28.
Land application of carbonatic lake-dredged materials: Effects on soil quality and forage productivity - (Peer Reviewed Journal)
Sigua, G.C., Coleman, S.W., Holtkamp, M.L. 2006. Land application of carbonatic lake-dredged materials: Effects on soil quality and forage productivity. Journal of Environmental Quality. 35:1784-1794.
GYPSUM-WATER MANAGEMENT INTERACTIONS ON THE SURVIVAL, YIELD, AND PROTEIN CONTENT OF SELECTED SPECIES OF MARSH VEGETATION - (Abstract Only)
Sigua, G.C., Hudnall, W.H., Prudente, J. 2006. Gypsum-water management interactions on the survival, yield, and protein content of selected species of marsh vegetation [abstract]. 33rd Annual Conference on Ecosystems Restoration and Creation Abstract Book. p.10.
PROPERLY MANAGED FORAGE-BASED COW-CALF OPERATIONS IN SOUTH CENTRAL FLORIDA ARE ENVIRONMENTALLY FRIENDLY ()
Sigua, G.C., Coleman, S.W., Williams, M.J. 2006. Properly managed forage-based cow-calf operations in south Central Florida are environmentally friendly. The Florida Cattleman and Livestock Journal. 70(10):44-47.
Levels of lead in urban soils from selected cities in central region of the Philippines - (Peer Reviewed Journal)
Ona, L.F., Alberto, A.P., Prudente, J.A., Sigua, G.C. 2006. Levels of lead in urban soils from selected cities in central region of the Philippines. Environmental Science and Pollution Research. 13(3):177-183.
PHOSPHORUS MANAGEMENT FOR FORAGE-BASED COW-CALF OPERATIONS IN FLORIA, USA: ENVIRONMENT AND PRODUCTIVITY - (Proceedings)
Sigua, G.C., Coleman, S.W. 2006. Phosphorus management for forage-based cow-calf operations in Floria, USA: Environment and productivity. International Symposium on Phosphorus Dynamics in the Soil Plant Continuum. 3:204-205.
USING LAKE DREDGED MATERIALS TO ENHANCE PASTURE ESTABLISHMENT ()
Sigua, G.C., Coleman, S.W. 2006. Using lake-dredged materials to enhance pasture establishment. The Florida Cattleman and Livestock Journal. 70(9):58-62.
LEVELS OF PHOSPHORUS IN SOILS AND TROPHIC STATE OF LAKES ASSOCIATED WITH GRAZED AND HAYED FORAGE-BASED PASTURE SYSTEMS IN FLORIDA - (Abstract Only)
Sigua, G.C., Coleman, S.W., Williams, M.J., Albano, J.P. 2005. Levels of phosphorus in soils and trophic state of lakes associated with grazed and hayed forage-based pasture systems in florida [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts. November 6-10, 2005. Salt Lake City, UT. ASA-CSSA-SSSA CD ROM.
STORMWATER BEST MANAGEMENT PRACTICE: CONVERSION OF IMPROVED PASTURES TO WETLAND SYSTEMS - (Proceedings)
Sigua, G.C., Griffin, J.C., Coleman, S.W. 2005. Stormwater best management practice: Conversion of improved pastures to wetland systems. In: Cannizzaro, P.J., editor. Proceedings of the 32nd Annual Conference on Ecosystems Restoration and Creation, October 27-28, 2005, Tampa, Florida. p. 141-152.
STORMWATER BEST MANAGEMENT PRACTICE: CONVERSION OF IMPROVED PASTURES TO WETLAND SYSTEMS - (Abstract Only)
Sigua, G.C., Jim, G., Coleman, S.W. 2005. Stormwater best management practice: conversion of improved pastures to wetland systems [abstract]. 32nd Annual Conference on Ecosystems Restoration and Creation. Tampa, FL. October, 27-28 2005
Long-term effects of grazing and haying on soil nutrient dynamics in forage-based beef cattle operations - (Peer Reviewed Journal)
Sigua, G.C., Williams, M.J., Coleman, S.W. 2006. Long-term effects of grazing and haying on soil nutrient dynamics in forage-based beef cattle operations. Journal of Sustainable Agriculture. 29(3):115-134.
Nitrogen and phosphorus status of soil and trophic state of lakes associated with forage-based beef cattle operations in Florida - (Peer Reviewed Journal)
Sigua, G.C., Williams, M.J., Coleman, S.W., Starks, R. 2006. Nitrogen and phosphorus status of soil and trophic state of lakes associated with forage-based beef cattle operations in Florida. Journal of Environmental Quality. 35:240-252.
Challenges: Soil dynamics and nutrient cycling - (Peer Reviewed Journal)
Sigua, G.C. 2006. Challenges: Soil dynamics and nutrient cycling. Journal of Soils and Sediments. 6(4):192-193.
Assessing impact of forage-based cattle operation on phosphorus and other crop nutrient loads in subtropical beef cattle pastures ()
Sigua, G.C. 2005. Assessing impact of forage-based cattle operation on phosphorus and other crop nutrient loads in subtropical beef cattle pastures. University of Florida Cooperative Extension Service Institute of Food and Agriculture Science 2004 Annual Research Reports.
ASSESSING EFFECTIVENESS OF ALUM TREATMENT AND WETLAND BEST MANAGEMENT PRACTICES FOR STORMWATER MANAGEMENT: QUALITY ASSURANCE PROJECT PLAN ()
Sigua, G.C. 2005. Assessing effectiveness of alum treatment and wetland best management practices for stormwater management: Quality assurance project plan. Southwest Florida Water Management District Report. 47 p.
Establishing bahiagrass in subtropical beef cattle pastures with lake-dredged materials - (Peer Reviewed Journal)
Sigua, G.C., Coleman, S.W. 2005. Establishing bahiagrass in subtropical beef cattle pastures with lake-dredged materials. Tropical Agriculture (Trinidad). 82(4):354-359.
Cumulative and residual effects of repeated sewage sludge applications: Forage productivity and soil quality implications in South Florida, USA - (Peer Reviewed Journal)
Sigua, G.C., Adjei, M.B., Rechcigl, J.E. 2005. Cumulative and residual effects of repeated sewage sludge applications: Forage productivity and soil quality implications in South Florida, USA. Environmental Science and Pollution Research. 12(2):80-88.
Simple model for simulation of wet deposition of chloride at a near-coastal site in Florida - (Peer Reviewed Journal)
Sumner, D.M., Sigua, G.C. 2005. Simple model for simulation of wet deposition of chloride at a near-coastal site in Florida. Florida Scientist. 68(4):236-246.
Characterization of pesticide chlordane in estuarine river sediments - (Peer Reviewed Journal)
Ouyang, Y., Ou, L.T., Sigua, G.C. 2005. Characterization of pesticide chlordane in estuarine river sediments. Journal of Environmental Quality. 34:544-551.
ASSESSING THE LEVELS OF NUTRIENTS IN SOILS AND WATER ASSOCIATED WITH FORAGE BASED PASTURE SYSTEM IN SUBTROPICS - (Abstract Only)
Sigua, G.C., Coleman, S.W., Albano, J.P. 2005. Assessing the levels of nutrients in soils and water associated with forage based pasture system in subtropics. Meeting Abstract.Abstracts of the 69th Annual Meeting of the Florida Academy of Sciences. page 6, AGR-22
CATTLE CONGREGATION SITES DO NOT APPEAR TO IMPACT SOIL NUTRIENTS BUILD-UP ()
Sigua, G.C., Coleman, S.W., Williams, M.J. 2005. Cattle congregation sites do not appear to impact soil nutrients build-up. The Florida Cattleman and Livestock Journal. 69(6):76-79.
BEEF CATTLE RESEARCH IN WEST CENTRAL FLORIDA - (Abstract Only)
Riley, D.G., Sigua, G.C. 2005. Beef cattle research in west central florida [abstract]. Florida Scientist. p.5. Paper No. AGR10.
USE OF DREDGED MATERIALS FOR PASTURE ESTABLISHMENT: FORAGE PRODUCTIVITY AND ECOLOGICAL IMPLICATIONS. - (Proceedings)
Sigua, G.C. 2005. Use of dredged materials for pasture establishment: Forage productivity and ecological implications. In: Cannizzaro, P.J., editor. Proceedings of the 31st Annual Conferences on Ecosystems Restoration and Creation. Tampa, Florida. p.117-128.
Current and future outlook of dredged and sewage sludge materials in agriculture and environment - (Peer Reviewed Journal)
Sigua, G.C. 2005. Current and future outlook of dredged and sewage sludge materials in agriculture and environment. Journal of Soils and Sediments. 5(1):50-52.
Assessing the efficacy of dredged materials from Lake Panasoffkee, Florida: Implication to environment and agriculture. Part 2-Pasture establishment and forage quality - (Peer Reviewed Journal)
Sigua, G.C., Holtkamp, M.L., Coleman, S.W. 2004. Assessing the efficacy of dredged materials from Lake Panasoffkee, Florida: Implication to environment and agriculture. Part 2-Pasture establishment and forage quality. ESPR Environmental Science and Pollution Research. 11(6):394-399.
Assessing the efficacy of dredged materials from Lake Panasoffkee, Florida: Implication to environment and agriculture. Part 1-Soil and environmental quality aspect - (Peer Reviewed Journal)
Sigua, G.C., Holtkamp, M.L., Coleman, S.W. 2004. Assessing the efficacy of dredged materials from Lake Panasoffkee, Florida: Implication to environment and agriculture. Part 1-Soil and environmental quality aspect. ESPR - Environmental Science and Pollution Research. 11(5):321-326.
WETLAND CONVERSION TO BEEF CATTLE PASTURE: IMPACT ON SOIL NUTRIENT DYNAMICS - (Abstract Only)
Sigua, G.C., Kang, W.J., Griffin, J., Coleman, S.W. 2004. Wetland conversion to beef cattle pasture: impact on soil nutrient dynamics. 2004 ASA-CSSA-SSSA Meeting Abstract CD-ROM. November 2004
LAKE DREDGING AND BEYOND: IMPLICATION TO AGRUCULTURE AND ENVIRONMENT - (Abstract Only)
Sigua, G.C., Holtkamp, M.L., Coleman, S.W. 2004. Lake dredging and beyond: implication to agruculture and environment. NCER Abstract, p.392
Lake-dredged material for beef cattle pasture establishment ()
Sigua, G.C., Holtkamp, M.L., Linton, J.M., Coleman, S.W. 2004. Lake-dredged material for beef cattle pasture establishment. Government Publication/Report. Available: http://www.dl.nwrc.gov/ tampa/ prod search tampa.aspx? prodid=463.
Lake-dredged materials for beef cattle pasture establishment in subtropics ()
Sigua, G.C., Holtkamp, M.L., Linton, J.M., Coleman, S.W. 2004. Lake-dredged materials for beef cattle pasture establishment in subtropics. USGS Digital Library.
Impact of cattle congregation sites on soil nutrients and soil compaction ()
Sigua, G.C. 2004. Impact of cattle congregation sites on soil nutrients and soil compaction. USDA-Agricultural Research Service, STARS Field Day Manual, Brooksville, Florida. p. 10-15.
LAKE DREDGED MATERIALS FOR BEEF CATTLE PASTURE ESTABLISHMENT IN SUBTROPICS - (Proceedings)
Sigua, G.C., Holtkamp, M.L., Linton, J.M., Coleman, S.W. 2005. Lake-dredged materials for beef cattle pasture establishment in subtropics. Proceedings 4th Tampa Bay Area Scientific Information Symposium. p. 239-244.
Wetland conversion to beef cattle pasture: Changes in soil properties - (Peer Reviewed Journal)
Sigua, G.C., Griffin, J., Kang, W., Coleman, S.W. 2004. Wetland conversion to beef cattle pasture: Changes in soil properties. Journal of Soils and Sediments. 4(1):4-10.
Project 15: McIntosh enhanced stormwater treatment wetland best management practice ()
Griffin, J., Sigua, G.C., Kang, W. 2004. Project 15: McIntosh enhanced stormwater treatment wetland best management practice. Florida Department of Environmental Protection, Section 319 Grant Work Plan. p. 131-150.
BASIN WIDE ASSESSMENT OF NITROGEN AND PHOSPHORUS LOADINGS IN THE INDIAN RIVER LAGOON, FLORIDA - (Abstract Only)
Sigua, G.C. 2004. Basin wide assessment of nitrogen and phosphorus loadings in the indian river lagoon, florida. Orlando Florida March 12-13,2004 Meeting Abstract. Florida Academy Abstract Book. p. 15.
Levels and changes of soil phosphorus in the subtropical beef cattle pastures - (Peer Reviewed Journal)
Sigua, G.C., Williams, M.J., Coleman, S.W. 2004. Levels and changes of soil phosphorus in the subtropical beef cattle pastures. Communications in Soil Science and Plant Analysis. 35(7&8):975-990.
RESIDUAL ASSESSMENT OF FORAGE YIELD AND SOIL CHEMICAL STATUS IN SUBTROPICAL BEEF CATTLE PASTURES FOLLOWING REPEATED BIOSOLIDS APPLICATION - (Abstract Only)
Sigua, G.C., Adjei, M.B., Rechcigl, J.E. Residual assessment of forage yield and soil chemical status in subtropical beef cattle pastures following repeated biosolids application. Bay Area Scientific Information Symposium. Lake Buena Vista, FL. Abstract p.81.
Soils and environment of grazed pasture ecosystems in subtropical United States: Trends and research results - (Peer Reviewed Journal)
Sigua, G.C. 2003. Soils and environment of grazed pasture ecosystems in subtropical United States: Trends and research results. Journal of Soils and Sediments. 3(4):258-260.
LAKE DREDGED MATERIALS FOR BEEF CATTLE PASTURE ESTABLISHMENT IN SUBTROPICS - (Abstract Only)
Sigua, G.C., Holtkamp, M.L., Linton, J.M., Coleman, S.W. 2003. Lake dredged materials for beef cattle pasture establishment in subtropics. Bay Area Scientific Information Symposium.Tampa, Florida
IMPACT OF GRAZING AND HAYING ON SOIL NUTRIENTS IN THE SUBTROPICAL BEEF CATTLE PASTURES - (Abstract Only)
Sigua, G.C., Williams, M.J., Coleman, S.W. 2003. Impact of grazing and haying on soil nutrients in the subtropical beef cattle pastures. 2003 Soil Science Society of America Journal. Denver, CO.
LAND APPLICATION OF LAKE-DREDGED MATERIALS FOR BAHIAGRASS ESTABLISHMENT IN THE SUBTROPICAL BEEF PASTURE - (Peer Reviewed Journal)
Sigua, G.C., Holtkamp, M.L., Linton, J.M., Coleman, S.W. 2003. Land application of lake-dredged materials for bahiagrass establishment in the subtropical beef pasture. Journal of Soils and Sediments. 3(2):93-99.
DISPOSAL ALTERNATIVE OF LAKE-DREDGED MATERIALS FOR BAHIAGRASS ESTABLISHMENT IN SUBTROPICAL BEEF PASTURE - (Abstract Only)
Sigua, G.C., Holtlcamp, M.L., Linton, J.M., Coleman, S.W. 2003. Disposal alternative of lake-dredged materials for bahiagrass establishment in subtropical beef pasture. American Society of Agronomy Meetings, Mobile AL.
WATER QUALITY OF SELECTED LAKES ASSOCIATED WITH BEEF CATTLE PASTURES IN CENTRAL FLORIDA ()
Sigua, G.C., Williams, M.J., Coleman, S.W. 2003. Water quality of selected lakes associated with beef cattle pastures in central Florida. Florida Cattleman and Livestock Journal. 64(4):47-49.
SOIL PHOSPHORUS DYNAMICS IN SUBTROPICAL BEEF CATTLE PASTURES UNDER DIFFERENT PASTURE MANAGEMENT - (Abstract Only)
Sigua, G.C., Williams, M.J., Coleman, S.W. 2002. Soil phosphorus dynamics in subtropical beef cattle pastures under different pasture management. 2002 ASA-CSSA-SSSA Meetings, Indianapolis, IN.
ESTIMATING HIGH-RESOLUTION ATMOSPHERIC DEPOSITION OF CHLORIDE IN COASTAL FLORIDA - (Abstract Only)
Sumner, D.M., Sigua, G.C. 2002. Estimating high-resolution atmospheric deposition of chloride in coastal florida. 2002 American Society of Agronomy Meetings, Indianapolis, IN.
Cattle grazing and the environment ()
Sigua, G.C. 2002. Cattle grazing and the environment. USDA-Agricultural Research Service STARS Field Day Manual, Brooksville, Florida. p. 40-42.
ASSESSING REDESIGNED EFFECTIVENESS OF THE WATER QUALITY MONITORING PROGRAM IN THE INDIAN RIVER LAGOON, FLORIDA - (Peer Reviewed Journal)
Sigua, G.C., Tweedale, W.A. 2004. Assessing redesigned effectiveness of the water quality monitoring program in the Indian River Lagoon, Florida. Aquatic Conservation: Marsh Freshwater Ecosystem 14:49-64.
WATERSHED SCALE ASSESSMENT OF NITROGEN AND PHOSPHORUS LOADINGS IN THE INDIAN RIVER LAGOON BASIN, FLORIDA - (Peer Reviewed Journal)
Sigua, G.C., Tweedale, W.A. 2003. Watershed scale assessment of nitrogen and phosphorus loadings in the Indian River Lagoon basin, Florida. Journal of Water Resources Planning and Management Vol.67:pp 363-372.
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