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United States Department of Agriculture

Agricultural Research Service

James E Ayars (Jim)
Agricultural Engineer


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Soil carbon and nitrogen stocks of different Hawaiian sugarcane cultivars Reprint Icon -
Tirado-Corbala, R., Anderson, R.G., Wang, D., Ayars, J.E. 2015. Soil carbon and nitrogen stocks of different Hawaiian sugarcane cultivars. Agronomy. 5(2):239. doi: 10.3390/agronomy5020239.
Deficit irrigation: is it impacting yield and nutritional quality of fruits? -
Centofanti, T., Banuelos, G.S., Wallis, C.M., Ayars, J.E. 2015. Deficit irrigation: is it impacting yield and nutritional quality of fruits?. New Ag International Magazine. March/April 54-56.
Water and nitrogen requirements of subsurface drip irrigated pomegranate -
Ayars, J.E., Phene, C.J., Phene, R.C. 2015. Water and nitrogen requirements of subsurface drip irrigated pomegranate. Meeting Proceedings. p. 149-158.
Subsurface drip irrigation in California - here to stay? -
Ayars, J.E., Fulton, A., Taylor, B. 2015. Subsurface drip irrigation in California - here to stay? Agricultural Water Management. 157:39-47.
Divergence of actual and reference evapotranspiration observations for irrigated sugarcane with windy tropical conditions Reprint Icon -
Anderson, R.G., Wang, D., Tirado-Corbala, R., Zhang, H., Ayars, J.E. 2015. Divergence of actual and reference evapotranspiration observations for irrigated sugarcane with windy tropical conditions. Hydrology and Earth System Sciences. 19:583-599.
UAS-based thermal remote sensing for crop water stress detection -
Long-rotation sugarcane in Hawaii sustains high carbon accumulation and radiation use efficiency in 2nd year of growth Reprint Icon -
Anderson, R.G., Tirado-Corbala, R., Wang, D., Ayars, J.E. 2014. Long-rotation sugarcane in Hawaii sustains high carbon accumulation and radiation use efficiency in 2nd year of growth. Agriculture, Ecosystems and Environment. 199:216-224.
Biophysical responses of young pomegranate tree to different irrigation and nitrogen treatments -
Zhang, H., Wang, D., Ayars, J.E., Phene, C. 2014. Biophysical responses of young pomegranate tree to different irrigation and nitrogen treatments. ASA-CSSA-SSSA International Annual Meeting, November 2-5, 2014, Long Beach, California. p. 72:7.
UAS-based infrared thermography for evaluating biofuel crop water status -
Zhang, H., Wang, D., Ayars, J.E. 2014. UAS-based infrared thermography for evaluating biofuel crop water status. ASA-CSSA-SSSA International Annual Meeting, November 2-5, 2014, Long Beach, California. Poster No. 228.
Influence of white plastic and water replacement rates on pomegranate orchard phenology, fruit yield and quality -
Makus, D.J., Ayars, J.E., Wang, D. 2014. Influence of white plastic and water replacement rates on pomegranate orchard phenology, fruit yield and quality. HortScience. Poster No. 297.
Protecting groundwater quality with high frequency subsurface drip irrigation -
Ayars, J.E., Phene, C.J. 2014. Protecting groundwater quality with high frequency subsurface drip irrigation. U.S. Committee on Irrigation and Drainage, USCID, March 4-7, 2014 in Sacramento, California. p. 151-161.
Divergence of reference evapotranspiration estimates under advective tropical conditions -
Carbon accumulation in a two year sugarcane rotation in Hawai’i, USA -
Anderson, R.G., Wang, D., Tirado-Corbala, R., Ayars, J.E. 2013. Carbon accumulation in a two year sugarcane rotation in Hawai’i, USA. Meeting Abstract. Paper No. 327-18.
Evaporation, transpiration, and ecosystem water use efficiency in a multi-annual sugarcane production system in Hawai’i, USA -
Water and nitrogen management of young and maturing pomegranate trees -
Wang, D., Phene, C., Phene, R., Ayars, J.E., Tirado-Corbala, R., Makus, D.J. 2015. Water and nitrogen management of young and maturing pomegranate trees. Acta Horticulturae. 1089:395-401.
Integrated on-farm drainage management for drainage water disposal -
Ayars, J.E., Soppe, R.O. 2014. Integrated on-farm drainage management for drainage water disposal. Journal of Irrigation and Drainage. 63(1):102-111.
Influence of nitrogen rate and drip application method on pomegranate fruit yield and quality -
Makus, D.J., Phene, R.C., Phene, C., Schoneman, R.A., Ayars, J.E. 2013. Influence of nitrogen rate and drip application method on pomegranate fruit yield and quality. HortScience. 48(9):S3.
The San Joaquin Valley: 20 years later -
Ayars, J.E., Hanson, B.R., Mirzaev, B. 2013. The San Joaquin Valley: 20 years later. Seventh International Conference on Irrigation and Drainage. Using 21st Century Technology to Better Manage Irrigation Water Supplies. Ed. B.T Wahlin, S.S. Anderson. p. 1-2
Soil carbon stock and total nitrogen in Hawaiian sugarcane commercial plantations -
Tirado-Corbala, R., Wang, D., Ayars, J.E., Gartung, J.L., Anderson, R.G., Zhang, H. 2012. Soil carbon stock and total nitrogen in Hawaiian sugarcane commercial plantations. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No. 142-16.
Dissolved organic carbon, total carbon and nitrogen in pomegranate cultivation under drip irrigation systems -
Tirado-Corbala, R., Wang, D., Ayars, J.E., Phene, C. 2012. Dissolved organic carbon, total carbon and nitrogen in pomegranate cultivation under drip irrigation systems. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No. 142-17.
Reuse/disposal of agricultural drainage water with high levels of salinity and toxic trace elements in central California. -
Banuelos, G.S., Ayars, J.E., Lin, Z.Q. 2012. Reuse/disposal of agricultural drainage water with high levels of salinity and toxic trace elements in central California. Zueng-Sang Chem (Ed) International remediation and management of soil & groundwater contaminated sites. pp. 207-215. National Taiwan Uni. Press, Taipei, Taiwan (Book Chapter)
Summaries and considerations -
Schwabe, K., Albiac, J., Andreu, J., Ayars, J.E., Caiola, N., Hayman, P., Ibanez, C. 2013. Summaries and considerations. In: Drought in Arid and Semi-Arid Regions: A multi-disciplinary and Cross-Country Perspective. New York, Springer. p. 471-507.
Growing more with less in the Westlands Water District in the San Joaquin Valley, California -
Ayars, J.E., Mirzaev, B. 2012. Growing more with less in the Westlands Water District in the San Joaquin Valley, California. Ecological Herald of Uzbekistan. p. 45-53.
Adapting irrigated agriculture to drought in the San Joaquin Valley of California -
Ayars, J.E. 2013. Adapting Irrigated Agriculture to Drought in the San Joaquin Valley of California. Agricultural Drought Monitoring Strategies in the World. p. 25-39.
Drainage of Irrigated Land -
Simulating root water uptake from a shallow saline groundwater resource Reprint Icon -
Shouse, P.J., Ayars, J.E., Simunek, J. 2011. Simulating Root Water Uptake From a Shallow Saline Groundwater Resource. Agricultural Water Management. 98(5):784-790.
Weighing Lysimeters for Developing Crop Coefficients and Efficient Irrigation Practices for Vegetable Crops -
Bryla, D.R., Trout, T.J., Ayars, J.E. 2010. Weighing lysimeters for developing crop coefficients and efficient irrigation practices for vegetable crops. HortScience. 45(11):1597-1604.
Changes in spatial and temporal variability of SAR affected by shallow groundwater management of an irrigated field, California -
Shouse, P.J., Goldberg, S.R., Skaggs, T.H., Soppe, R.O., Ayars, J.E. 2010. Changes in spatial and temporal variability of SAR affected by shallow groundwater management of an irrigated field, California. Agricultural Water Management. 97(5):673-680.
Integrated irrigation and drainage water management -
Ayars, J.E., Hanson, B.R. 2014. Integrated irrigation and drainage water management. In: Chang, A.C., Silva, D.B. editors. Salinity and drainage in the San Joaquin Valley, California: Science, Technology, Policy Global Issues in Water Policy 5. New York, NY: Springer p. 249-276.
In-situ Use of Ground Water by Alfalfa -
Ayars, J.E., Shouse, P.J., Lesch, S.M. 2009. In-situ Use of Ground Water by Alfalfa. Agricultural Water Management. 96(11) 1579-1586.
Irrigation Systems Operation -
Alfalfa production using saline drainage water -
Ayars, J.E., Soppe, R.W., Shouse, P.J. 2011. Alfalfa production using saline drainage water. Journal of Irrigation and Drainage. 60(1):123-135.
Sustaining Irrigated Agriculture in Arid Areas: Lessons Learned in the San Joaquin Valley -
Ayars, J.E. 2009. Sustaining Irrigated Agriculture in Arid Areas: Lessons Learned in the San Joaquin Valley. ASABE Annual International Meeting. 095522.
A weighing lysimeter for crop water use determination in the Jordan Valley, Jordan -
Evett, S.R., Mazahrih, N., Jitan, M.A., Sawalha, M.H., Colaizzi, P.D., Ayars, J.E. 2009. A weighing lysimeter for crop water use determination in the Jordan Valley, Jordan. Transactions of the American Society of Agricultural and Biological Engineers. 52(1):155-169.
ON-FARM IRRIGATION AND DRAINAGE PRACTICES -
Leaching and Root Zone Salinity Control -
Ayars, J.E., Corwin, D.L., Hoffman, G.J. 2012. Leaching and root zone salinity control. In: Wallender, W.W. and Tanji, K.K. (eds.) ASCE Manual and Reports on Engineering Practice No. 71 Agricultural Salinity Assessment and Management. 2nd Edition. ASCE, Reston, VA. p. 371-403.
SHALLOW GROUNDWATER USE BY ALFALFA -
Ayats, J.E. 2008. Shallow Groundwater Use by Alfalfa. California Alfalfa and Forage Symposium and Western Alfalfa Seed Conference. 115-130.
WATER REQUIREMENT OF IRRIGATED GARLIC -
Ayars, J.E. Water requirement of irrigated garlic. Proceedings of the American Society of Agricultural and Biological Engineers International (ASABE)51(5):1683-1688, 2008.
Noise Reduction Methods for Weighing Lysimeters -
Vaughan,P.J. and J.E. Ayars. 2009. Noise reduction Methods for Weighing Lysimeters. Journal of Irrigation and Drainage Engineering. Vol. 135, No. 2:235-240.
Field calibration accuracy and utility for four down-hole water content sensors -
Mazahrih, N., Nedal, K., Evett, S.R., Ayars, J.E., Trout, T.J. 2008. Field calibration accuracy and utility for four down-hole water content sensors. Vadose Zone Journal. 7:992-1000.
Drainage Water Quality Issues In North America -
Madramootoo, C.C., Johnston, W.R., Ayars, J.E., Evans, R.O., Fausey, N.R. 2007. Drainage Water Quality Issues In North America. Journal of Irrigation and Drainage Engineering. 56:535-545.
Delineating site-specific management units using geospatial ECa measurements -
Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R., Ayars, J.E. 2008. Delineating site-specific management units using geospatial ECa measurements. In: B.J. Allred, J.J. Daniels and M.R. Ehsani (editors) Handbook of Agricultural Geophysics. CRC Press. Boca Raton, FL. Chapter 16 pp: 247-254.
Book Review of "Water Resources in Jordan: Evolving Policies for Development, the Environment, and Conflict Resolution" Munther J. Haddadin (ed) -
Ayars, J.E. 2007. Book Review of "Water Resources in Jordan: Evolving Policies for Development, the Environment, and Conflict Resolution" Munther J. Haddadin (ed). Agricultural Water Management.Vol 93(1-2):84
In-Situ Use of Ground Water By Alfalfa -
Ayars, J.E., Shouse, P.J. 2007. In-Situ Use of Ground Water By Alfalfa. ASABE Annual International Meeting.Paper #072186, 2007 ASABE Annual Meeting
Water Requirements Of Irrigated Garlic -
Ayars, J.E. 2007. Water Requirements Of Irrigated Garlic. Proceedings of the American Society of Agricultural and Biological Engineers International (ASABE). Paper #72285, 2007 ASABE Annual Meeting
Managing Irrigation And Drainage In Saline Environments -
Ayars, J.E., Christen, E., Hornbuckle, J. 2007. Managing Irrigation And Drainage In Saline Environments. CAB Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resourcs 2007 2, No. 040.
A PROCESSING METHOD FOR WEIGHING LYSIMETER DATA AND COMPARISON TO MICROMETEOROLOGICAL ETO PREDICTIONS. -
Vaughan, P.J., Trout, T.J., Ayars, J.E. 2006. A processing method for weighing lysimeter data and comparison to micrometeorological eto predictions. Agricultural Water Management, Volume 88, Issues 1-3, March 16, 2007, Pages 141-146.
Water Table Control Systems -
Fouss, J.L., Evans, R.O., Ayars, J.E., Christen, E.W. 2007. Water Table Control Systems. Book Chapter. Design and Operation of Farm Irrigation Systems, 2nd edition; Published by the American Society of Agricultural and Biological Engineers (ASABE); Eds., G.J. Hoffman, R.G. Evans, M.E. Jensen, D.L. Martin and R. L. Elliott. Chapter 18, pp. 684-724. August 2007. ISBN: 1-892769-64-6.
CONTROLLED DRAINAGE FOR IMPROVED WATER MANAGEMENT IN ARID REGIONS IRRIGATED AGRICULTURE. -
Ayars, J.E., Christen, E.W., Hornbuckle, J.W. 2006. Controlled drainage for improved water management in arid regions irrigated agriculture. Agricultural Water Management 86 (20060 128-139.
DELINEATING SITE-SPECIFIC IRRIGATION MANAGEMENT UNITS USING GEOSPATIAL ECA MEASUREMENTS -
Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R.W., Ayars, J.E. 2006. Delineating site-specific irrigation management units using geospatial eca measurements. World Congress of Soil Science. Paper No. 153-19
TECHNOLOGY AND PRACTICE FOR IRRIGATION IN VEGETABLES -
IRRIGATING FIELD CROPS IN THE PRESENCE OF SALINE GROUNDWATER -
Ayars, J.E., Schoneman, R.A. 2006. Irrigating field crops in the presence of saline groundwater. Journal of Irrigation and Drainage. Vol 55: 265-279.
SOIL WATER CONTENT SAMPLING IN SPACE AND TIME: A COMPARISON OF METHODS -
Evett, S.R., Ruthardt, B.B., Mazahrih, N., Katbehbader, N., Howell, T.A., Tolk, J.A., Ayars, J.E. 2006. Soil water content sampling in space and time: A comparison of methods [abstract]. 18th World Congress of Soil Science. Paper No. 100-3.
EFFECTS OF SHALLOW GROUNDWATER MANAGEMENT ON THE SPATIAL AND TEMPORAL VARIABILITY OF BORON AND SALINITY IN AN IRRIGATED FIELD -
Shouse, P.J., Goldberg, S.R., Soppe, R.W., Skaggs, T.H., Ayars, J.E. 2006. Effects of shallow groundwater management on the spatial and temporal variability of boron and salinity in an irrigated field. Vadose Zone Journal. 5:377-390.
ON-FARM DISPOSAL OF SALINE DRAINAGE WATER -
Ayars, J.E., Basinal, L., Cervinka, V. 2006. On-farm disposal of saline drainage water. ASABE Annual International Meeting. Vol and pg nos pending.
APPLICATION OF FIELD PHYTOREMEDIATION UNDER HIGH SALINE AND BORON CONDITIONS. -
Banuelos, G.S., Ayars, J.E. 2005. Application of Field Phytoremediation Under High Saline and Boron Conditions. Plant Nutrition Colloquium Proceedings. pp 642-643, In: Plant nutrition for food security, human health and environmental protection. Tsinghua University Press, Beijing, China.
RECENT APPLICATIONS OF HYDRUS IN IRRIGATED AGRICULTURE -
Skaggs, T.H., Trout, T.J., Kelleners, T.J., Shouse, P.J., Ayars, J.E. 2005. Recent applications of hydrus in irrigated agriculture. In: S. Torkzaban and S. Majid Hassanizadeh (eds.), Proceedings of Workshop on HYDRUS Applications. October 19, 2005, ISBN 90-39341125, Department of Earth Sciences, Utrecht University, Utrecht, The Netherlands. p: 69-72.
THE RESOURCE POTENTIAL OF IN-SITU SHALLOW GROUND WATER USE IN IRRIGATED AGRICULTURE - A REVIEW. -
Ayars, J.E., Christen, E.W., Soppe, R.W., Meyer, W.S. 2005. The resource potential of in-situ shallow ground water use in irrigated agriculture - a review.. Irrigation Science, 2006, Vol 24: 147-160.
GRAPEVINE WATER USE AND CROP COEFFICIENT ARE LINEAR FUNCTIONS OF THE SHADED AREA MEASURED BENEATH THE CANOPY -
Williams, L.S., Ayars, J.E. 2005. Grapevine water use and crop coefficient are linear functions of the shaded area measured beneath the canopy. Agricultural and Forest Meteorology. Vol. (132) pgs. 201-211.
OCCURRENCE AND MEASUREMENT OF SALINITY STRATIFICATION IN THE SHALLOW GROUND WATER IN THE MURRUMBIDGEE IRRIGATION AREA, SOUTH EASTERN AUSTRALIA. -
Northey, J., Christen, E., Ayars, J.E., Jankowski, J. 2005. Occurrence and measurement of salinity stratification in the shallow ground water in the murrumbidgee irrigation area, south eastern Australia. Agricultural Water Management, Vol 81 (2006) 23-40.
IRRIGATING FIELD CROPS IN THE PRESENCE OF SALINE GROUND WATER -
Ayars, J.E., Schoneman, R.A. 2005. Irrigating field crops in the presence of saline ground water. International Congress on Irrigation and Drainage. Vol, 1-B, pp 131-133.
SPATIAL AND TEMPORAL DISTRIBUTIONS OF SALINITY AND BORON IN AN IRRIGATED FIELD UNDER SHALLOW GROUNDWATER MANAGEMENT -
Shouse, P.J., Goldberg, S.R., Soppe, R.W., Skaggs, T.H., Ayars, J.E. 2005. Spatial and temporal distributions of salinity and boron in an irrigated field under shallow groundwater management. In: Proceedings of the International Salinity Forum, Managing Saline Soils and Water: Science, Technology, and Soil Issues. April 25-27, 2005. Riverside, CA pp:417-420.
ANALYSIS OF FIELD-SCALE SALINIZATION: A COMPARISON OF DIFFERENT MODELING APPROACHES -
Vaughan, P.J., Shouse, P.J., Suarez, D.L., Van Genuchten, M.T., Ayars, J.E. 2005. Analysis of field-scale salinization: a comparison of different modeling approaches. Journal of Hydrology and Hydromechanics. 53(2):73-90.
DRIP IRRIGATION IMPROVES POTENTIAL PROFITS FOR GROWING PEACH -
Bryla, D.R., Gartung, J.L., Trout, T.J., Johnson, R.S., Ayars, J.E., 2005. Drip irrigation improves potential profits for growing peach. California Plant and Soil Conference Proceedings. 111-115.
WEIGHING LYSIMETERS FOR STUDYING TREE AND VINE WATER RELATIONS. -
Johnson, R.S., Williams, L.E., Ayars, J.E., Trout, T.J. 2005. Weighing lysimeters for studying tree and vine water relations.. California Agriculture. Apr-Jun 2005, pgs. 133-136.
OCCURRENCE AND MEASUREMENT OF SALINITY STRATIFICATION IN SHALLOW GROUNDWATER IN THE MURRUMBIDGEE IRRIGATION AREA, SOUTH-EASTERN AUSTRALIA. -
Northey, J., Christen, E.W., Ayars, J.E., Jankowski, J. 2005. Occurrence and Measurement of Salinity Stratification in Shallow Groundwater in the Murrumbidgee Irrigation Area, South-Eastern Australia. Agricultural Water Management. Vol. 81, pp 23-40.
WATER USE OF THOMPSON SEEDLESS GRAPEVINES AS AFFECTED BY THE APPLICATION OF GIBBERELLIC ACID (GA3) AND TRUNK GIRDLING - PRACTICES TO INCREASE BERRY SIZE. -
Williams, L.E., Ayars, J.E. 2005. Water use of thompson seedless grapevines as affected by the application of gibberellic acid (ga3) and trunk girdling - practices to increase berry size.. Agricultural and Forest Meteorology.
WATER USE OF THOMPSON SEEDLESS GRAPEVINES AS AFFECTED BY THE APPLICATION OF GIBBERELLIC ACID (GA3) AND TRUNK GIRDLING - PRACTICES TO INCREASE BERRY SIZE -
Williams, L.E., Ayars, J.E. 2005. Water use of thompson seedless grapevines as affected by the application of gibberellic acid (ga3) and trunk girdling - practices to increase berry size. Agricultural and Forest Meteorology Conference Proceedings. Vol. 129, pgs. 85-94.
CONTROLLED WATER TABLE MANAGEMENT AS A STRATEGY FOR REDUCING SALT LOADS FROM SUBSURFACE DRAINAGE UNDER PERENNIAL AGRICULTURE IN SEMI-ARID AUSTRALIA. -
Hornbuckle, J.W., Christen, E.W., Ayars, J.E., Faulkner, R.D. 2005. Controlled water table management as a strategy for reducing salt loads from subsurface drainage under perennial agriclture in semi-arid australia.. Journal of Irrigation and Drainage Systems. Vol. 19: 145-159.
FREQUENCY DEPENDENCE OF THE COMPLEX PERMITTIVITY AND ITS IMPACT ON DIELECTRIC SENSOR CALIBRATION IN SOILS -
Kelleners, T.J., Robinson, D.A., Shouse, P.J., Ayars, J.E., Skaggs, T.H., 2005. Frequency dependence of the complex permittivity and its impact on dielectric sensor calibration in soils. Soil Science Society of America Journal. 69:67-76.
INVERSE ANALYSIS OF UPWARD WATER FLOW IN A GROUNDWATER TABLE LYSIMETER -
Kelleners, T.J., Soppe, R.W., Ayars, J.E., Simunek, J., Skaggs, T.H. 2005. Inverse analysis of upward water flow in a groundwater table lysimeter. Vadose Zone Journal. Vol 4: 558-572 (2005)
IMPROVING WATER MANAGEMENT IN IRRIGATED AGRICULTURE. -
Ayars, J.E. 2004. Improving water management in irrigated agriculture.. USCID International Conference. Proceedings 2004 Water Management Conference. Water right and Related Water Supply Issues, pg 375-384.
INTEGRATED WATER MANAGEMENT FOR SALINE DRAINAGE WATER DISPOSAL -
Ayars, J.E., Soppe, R.W. 2004. Integrated water management for saline drainage water disposal. National Salinity Engineering Conference Proceedings. Engineers Australia, Engineering Salinity Solutions, (no volume), pp 9-14.
METHODOLOGY TO ASSESS THE PERFORMANCE OF SUBSURFACE DRAINAGE SALINITY CONTROL. -
Christen, E.W., Hornbuckle, J.W., Ayars, J.E. 2004. Methodology to assess the performance of subsurface drainage salinity control.. National Salinity Engineering Conference Proceedings. Engineers Australia, Engineering Salinity Solutions, pp 21-25.
BEST MANAGEMENT PRACTAICES FOR MINIMIZING SALT LOADS FROM SUBSURFACE DRAINAGE SYSTEMS. -
Christen, E.W., Ayars, J.E., Hornbuckle, H.W. Best management practaices for minimizing salt loads from subsurface drainage systems.. Agricultural Engineering International Conference Proceedings. CD publication of ICID, March 14-17, 2004.
BORON TRANSPORT WITHIN AN AGRICULTURAL FIELD: UNIFORM FLOW VERSUS MOBILE-IMMOBILE MODEL SIMULATIONS -
Vaughan, P.J., Shouse, P.J., Suarez, D.L., Goldberg, S.R., Ayars, J.E. 2004. Boron transport within an agricultural field: uniform flow versus mobile-immobile model simulations. Soil Science. 169(6):401-412.
CHARACTERIZING SOIL SPATIAL VARIABILITY FOR PRECISION AGRICULTURE USING GEOPHYSICAL MEASUREMENTS -
Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R., Ayars, J.E. 2004. Characterizing soil spatial variability for precision agriculture using geophysical measurements. Proceedings of 17th Annual Symposium on the Application of Geophysics to Engineering and Environmental Problesm (SAGEEP). Colorado Springs, CO on February 22-26, 2004. CDROM.
INTEGRATING EM SURVEY, SOIL SAMPLING AND WATERTABLE DATA TO MANAGE SUBSURFACE DRAINAGE FOR SALT DISCHARGE REDUCTION:A BASE STUDY. -
Christen, E.W., Hornbuckle, J., Herath, S., Ayars, J.E., Soppe, R.W. 2004. Integrating em survey, soil sampling and watertable data to manage subsurface drainage for salt discharge reduction:a base study.. 2nd International Conference and Workshop on the Coffee Berry Borer. No vol or pgs, on CD ROM.
CALIBRATION OF CAPACITANCE PROBE SENSORS IN A SALINE SILTY CLAY SOIL -
Kelleners, T.J., Soppe, R.W., Ayars, J.E., Skaggs, T.H. 2004. Calibration of capacitance probe sensors in a saline silty clay soil. Soil Science Society of America Journal. 68:770-778.
INFLUENCE OF SOIL SPATIAL VARIABILITY ON CROP YIELD VARIABILITY -
Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R., Jobes, J.A., Fargerlund, J., Ayars, J.E. 2003. Influence of soil spatial variability on crop yield variability. Soil Science Society of America. Paper No. S05-corwin929996-P.
CALIBRATION OF CAPACITANCE PROBE SENSORS USING ELECTRIC CIRCUIT THEORY -
Kelleners, T.J., Soppe, R., Robinson, D., Schaap, M., Ayars, J.E., Skaggs, T.H. 2003. Calibration of capacitance probe sensors using electric circuit theory. CD-ROM. Agronomy Abstracts. Denver, CO.
FIELD CROP PRODUCTION IN AREAS WITH SALINE SOILS AND SHALLOW SALINE GROUND WATER IN THE SAN JOAQUIN VALLEY OF CALIFORNIA. -
Ayars, J.E. 2003. Field crop production in areas with saline soils and shallow saline ground water in the san joaquin valley of california.. Journal of Crop Production. Vol. 7, No 1/2: pg 353-386.
GROWTH AND EARLY PRODUCTION OF YOUNG PEACH TREES IRRIGATED BY FURROW, MICROSPRINKLER, SURFACE DRIP, OR SUBSURFACE DRIP. -
BRYLA, D.R., TROUT, T.J., AYARS, J.E., JOHNSON, S. 2003. GROWTH AND EARLY PRODUCTION OF YOUNG PEACH TREES IRRIGATED BY FURROW, MICROSPRINKLER, SURFACE DRIP, OR SUBSURFACE DRIP.. HORTSCIENCE. 2003. Vol. 38 (6) pp 1112-1116.
INTRODUCTION OF BOOK TITLED MICROIRRIGATION FOR CROP PRODUCTION -
Ayars, J.E., Bucks, D.A., Lamm, F.R., Nakayama, F.S. 2006. Introduction of book titled microirrigation for crop production. Microirrigation International Conference Proceedings. Book/Chapter, Chapter 1, pgs 1-26.
CALIBRATION OF CAPACITANCE PROBE SENSORS USING ELECTRIC CIRCUIT THEORY -
Kelleners, T.J., Soppe, R.W., Robinson, D.A., Schaap, M.G., Ayars, J.E., Skaggs, T.H. 2004. Calibration of capacitance probe sensors using electric circuit theory. Soil Science Society of America Journal. 68:430-439.
MICROIRRIGATION FOR CROP PRODUCTION -
Lamm, F.R., Ayars, J.E., Nakayama, F.S. 2006. Microirrigation for Crop Production. Amsterdam: Elsevier. 618 p.
AUTOMATION -
Ayars, J.E., Phene, C.J. 2006. Automation. Book Chapter. Chapter 7 Microirrigation for Crop Production, pgs 259-284.
STRATEGIES FOR REDUCING SUBSURFACE DRAINAGE IN IRRIGATED AGRAICULTURE THROUGH IMPROVED IRRIGATION. -
Irrigation and Drainage Systems 16: 261-277, 2002.
PREPLANT IRRIGATION -
Ayars, J.E. 2003. Preplant irrigation. Encyclopedia of Water Science. On line publication, March 2003, pg. 498-501.
IRRIGATION SCHEDULING OF COTTON WITH FDR PROBES IN THE PRESENCE OF SHALLOW SALINE GROUNDWATER -
Ayars, J.E., Soppe, R. 2002. Irrigation scheduling of cotton with fdr probes in the presence of shallow saline groundwater. Transactions of First International Symposium on Soil Water Measurement Using Capacitance Impedance and TDT. No vol. or pgs. on CD ROM.
IRRIGATION STRATEGIES FOR IMPROVING PRODUCTIVITY AND WATER USE EFFICIENCY OF VEGETABLE CROPS IN THE SAN JOAQUIN VALLEY. -
BRYLA, D.R., SEFTON, R.K., SOPPE, R., GARTUNG, J.L., TROUT, T.J., AYARS, J.E. 2002. IRRIGATION STRATEGIES FOR IMPROVING PRODUCTIVITY AND WATER USE EFFICIENCY OF VEGETABLE CROPS IN THE SAN JOAQUIN VALLEY.. ASA-CSSA-SSSA PROCEEDINGS.
NUMERICAL MODELING OF SUBSURFACE DRIP IRRIGATION -
Skaggs, T.H., Simunek, J., Ayars, J.E., Trout, T.J. Numerical modeling of subsurface drip irrigation. Agronomy Abstracts. In Annual meetings abstracts (CD-ROM). ASA, CSSA, and SSSA, Madison, WI.
CHAPTER 6 DESIGN AND MANAGEMENT OF RECLAIMED WATER IRRIGATION SYSTEMS -
Christen, E., Ayars, J.E., Hornbuckle, J., Biswas, T. 2006. Chapter 6 design and management of reclaimed water irrigation systems. Australian Journal of Soil Research, Chapter 6, pp 107-123.
STRATEGIES FOR REDUCING DEEP PERCOLATION IN IRRIGATED AGRICULTURE. -
Hanson, B.R., Ayars, J.E. 2002. Strategies for reducing deep percolation in irrigated agriculture. Journal of Irrigation and Drainage Systems. Vol. 16(4):261-277.
IDENTIFING SOIL PROPERTIES THAT INFLUENCE COTTON YIELD USING SOIL SAMPLING DIRECTED BY APPARENT BULK SOIL ELECTRICAL CONDUCTIVITY -
Corwin, D.L., Lesch, S.M., Shouse, P.J., Soppe, R.W., Ayars, J.E. 2003. Identifing soil properties that influence cotton yield using soil sampling directed by apparent bulk soil electrical conductivity. Agronomy Journal. Vol 95:352-364
CHARACTERIZING GROUND WATER USE BY SAFFLOWER USING WEIGHING LYSIMETERS. -
BEST MANAGEMENT PRACTICES FOR SUBSURFACE DRAINAGE AND SYSTEM DESIGN AND MANAGEMENT FOR IRRIGATED AGRICULTURE -
Ayars, J.E., Christen, E.W. 2002. Best management practices for subsurface drainage and system design and management for irrigated agriculture. Proceedings of the USCID Wetlands Seminar. No Vol., pg. 187-196.
WATER USE BY DRIP IRRIGATED LATE SEASON PEACHES -
REDUCING IRRIGATION IN THE PRESENCE OF SHALLOW GROUNDWATER USING THE COTTON 21C MODEL -
Ayars, J.E., Soppe, R., Marani, A. 2002. Reducing irrigation in the presence of shallow groundwater using the cotton 21c model. Proceedings 18th Congress of International Committee of Irrigation and Drainage. No vol. or pgs. on CD ROM.
SUBSURFACE DRAINAGE SYSTEM DESIGN AND MANAGEMENT IN IRRIGATED AGRICULTURE BEST MANAGEMENT PRACTICES FOR REDUCING DRAINAGE VOLUME AND SALT LOAD. -
Christen, E.W., Ayars, J.E. 2001. Subsurface drainage system design and management in irrigated agriculture best management practices for reducing drainage volume and salt load.. CSIRO Australia Griffith NSW. Technical Report 38/01, pg 136.
IRRIGATION SYSTEMS OPERATION -
SUBSURFACE DRAINAGE DESIGN AND MANAGEMENT IN IRRIGATED AREAS OF AUSTRALIA: PAST PRACTICES AND FUTURE DIRECTION -
SHALLOW GROUNDWATER MANAGEMENT TO REDUCE EXCESS DRAINAGE WATER PRODUCTION IN ARID AND SEMI-ARID IRRIGATED AREAS. -
PRE-PLANT IRRIGATION. -
DRAINAGE OF IRRIGATED LAND -
IMPROVING GROWTH IN YOUNG PEACH TREES BY SUBSURFACE DRIP IRRIGATION. -
CHARACTERIZING GROUNDWATER USE BY COTTON USING WEIGHING LYSIMETERS. -
ION EXCHANGE REMOVAL OF BORON FROM AGRICULTURAL DRAINAGE WATER. -
STATE SPACE ANALYSIS OF SOIL WATER AND SALINITY REGIMES IN A LOAM SOIL UNDERLAIN BY SHALLOW GROUNDWATER. -
REALIZING THE POTENTIAL OF INTEGRATED IRRIGATION AND DRAINAGE WATER MANAGEMENT FOR MEETING CROP WATER REQUIREMENTS IN SEMI-ARID AND ARID AREAS -
IRRIGATION MANAGEMENT OF COTTON IN THE PRESENCE OF A CONTROLLED DRAINAGE SYSTEM -
WATER USE BY DRIP IRRIGATED LATE SEASON PEACHES -
MANAGING SUBSURFACE DRIP IRRIGATION IN THE PRESENCE OF SHALLOW GROUND WATER -
SOIL SALINITY MODELING UNDER SHALLOW WATER TABLE CONDITIONS II APPLICATION OF LEACHC -
SOIL SALINITY MODELING UNDER SHALLOW WATER TABLE CONDITIONS: I VALIDATION OF LEACHC. -
CONTINUOUS MEASUREMENT OF DRAINAGE DISCHARGE -
SUBSURFACE DRIP IRRIGATION OF ROW CROPS: A REVIEW OF 15 YEARS OF RESEARCH AT THE WATER MANAGEMENT RESEARCH LABORATORY -
IRRIGATING COTTON IN THE PRESENCE OF SHALLOW GROUND WATER -
STRATEGIES FOR UTILIZING SHALLOW GROUND WATER IN ARID AREAS -
INTEGRATED MANAGEMENT OF IRRIGATION AND DRAINAGE SYSTEMS IN ARID AREAS -
WEIGHING LYSIMETERS FOR SHALLOW GROUND WATER MANAGEMENT STUDIES -
WEIGHING LYSIMETERS FOR SHALLOW GROUND WATER MANAGEMENT STUDIES -
MANAGING SALT LOAD IN IRRIGATION DISTRICT DRAINAGE WATER -
WATER QUALITY AS A DESIGN CRITERION IN DRAINAGE WATER MANAGEMENT SYSTEMS -
IMPACT OF IRRIGATION MANAGEMENT ON DISTRICT DRAIN FLOW AND SALT LOAD: A CASE STUDY OF THE PANOCHE WATER AND DRAINAGE DISTRICT -
IMPACT OF AGRICULTURAL WATER CONSERVATION ON WATER QUALITY IN ARID IRRIGATED AREAS -
ALTERNATIVES FOR MANAGING SHALLOW GROUND WATER IN ARID IRRIGATED AREAS -
SHALLOW GROUND WATER MANAGEMENT WITH A MODIFIED SUBSURFACE DRAINAGE SYSTEM -
COMBINING MONOLITHIC AND REPACKED SOIL TANKS FOR HIGH WATER TABLE LYSIMETERS -
Last Modified: 8/26/2016
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