Additional Page: Publications*
William (Bill) Iversen began working winter seasons with the ARS as a computer assistant in 1990. He helped to install the initial computer network cabling and equipment at the Sidney location. In addition to providing computer support to the Sidney location, his duties included implementation of the use of the then fledgling Global Positioning and Geographic Information Systems for a leafy spurge biological control program.
In 1997 Bill was recruited as a Physical Science Technician for a site-specific farming initiative under the direction of Dr. Gerry Anderson. This position utilized skills in the integration of remote sensing, global positioning, yield monitors and geographic information system technology in the mapping of specific variables relating to crop yield and quality.
He has long been interested in minimum tillage and in 1993 and 1994 received grants from the Alternate Energy Resource Organization to study strip tillage in sugar beets on his farm.
Iversen taught electronics at the University of South Dakota/Springfield from 1976 to 1978 before electing to farm full time. He has owned and operated an irrigated and dryland farm since 1978, growing sugar beets, dry beans, corn, alfalfa, wheat and malting barley, as well as a cattle feedlot.
Evans, R.G., Iversen, W.M., Stevens, W.B., Jabro, J.D. 2010. Development of Combined Site-Specific MESA and LEPA Methods on a Linear Move Sprinkler Irrigation System. Applied Engineering in Agriculture. 26(5):883-895. (PDF; 10370 KB)
Evans, R.G., Stevens, W.B., Iversen, W.M. 2010. Development of Strip Tillage on Sprinkler Irrigated Sugarbeet. Applied Engineering in Agriculture. 26(1):59-69. (PDF; 7123 KB)
Jabro, J.D., Stevens, W.B., Evans, R.G., Iversen, W.M. 2010. Spatial Variability and Correlation of Selected Soil Properties in the AP Horizon of the CRP Grassland. Applied Engineering in Agriculture. 26(3):419-428. (PDF; 2274 KB)
Jabro, J.D., Stevens, W.B., Iversen, W.M., Evans, R.G. 2010. Tillage depth effects on soil physical properties, sugarbeet yield and quality. Communications in Soil Science and Plant Analysis. 41: 7:908-916. (PDF; 216 KB)
Stevens, W.B., Evans, R.G., Jabro, J.D., Iversen, W.M. 2010. Nitrogen Availability for Sugarbeet affected by Tillage System and Sprinkler Irrigation Method. Agronomy Journal. 102:1745-1752. (PDF; 1064 KB)
Jabro, J.D., Evans, R.G., Kim, Y., Iversen, W.M. 2009. Estimating in situ soil-water retention and field water capacity measurements in two contrasting soil textures. Irrigation Science. 27:223-229.
Jabro, J.D., Stevens, W.B., Evans, R.G., Iversen, W.M. 2009. Tillage effects on physical properties in two soils of the Northern Great Plains. Applied Engineering in Agriculture. 24(3): 377-382. (PDF; 143 KB)
Kim, Y., Evans, R.G., Iversen, W.M. 2009. Evaluation of closed-loop site-specific irrigation with wireless sensor network. Journal of Irrigation and Drainage Engineering. 135(1): 25-31. (PDF; 4724 KB)
Kim, Y., Evans, R.G., Iversen, W.M. 2008. Remote sensing and control of irrigation system using a distributed wireless sensor network. IEEE Transactions on Instrumentation and Measurement. 57(7):1379-1387.
Stevens, W.B., Iversen, W.M., Evans, R.G., Jabro, J.D., Kim, Y. 2008. Strip tillage for sugarbeet and its implications for N fertilizer management. Proceedings of Great Plains Soil Fertility Conference. 12:54-60.
Jabro, J.D., Evans, R.G., Stevens, W.B., Iversen, W.M. 2008. Repeatability of soil apparent electrical conductivity measured by a coulter sensor. Soil Science. 173(1):35-45. (PDF; 6336 KB)
Jabro, J.D., Kim, Y., Evans, R.G., Iversen, W.M., Stevens, W.B. 2008. Passive capillary sampler for measuring soil water drainage and flux in the vadose zone: Design, performance and enhancement. Applied Engineering in Agriculture. 24(4):439-446. (PDF 384 KB)
Kim, Y., Evans, R.G., Iversen, W.M. 2007. Wireless Site-specific Irrigation - The Future of Intelligent Agriculture. Resource Magazine. October, Special Issue, 14:(7):2-3.
Stevens, W.B., Evans, R.G., Iversen, W.M. 2007. Two irrigation methods on strip-tilled and conventionally tilled sugarbeets and barley. The Sugarbeet Grower. 46(2):4-6.
Evans, R.G., Iversen, W.M., Stevens, W.B. 2006. Strip-Till Research on Beets. the Sugarbeet Grower. 45(2):16-19.
Jabro, J.D., Evans, R.G., Kim, Y., Stevens, W.B., Iversen, W.M. 2006. Characterization of spatial variability of soil electrical conductivity and cone index using coulter and penetrometer-type sensors. Soil Science. 171(8):627-637. (PDF; 636 KB)
Sainju, U.M., Evans, R.G., Iversen, W.M. 2006. Irrigation System Effects on Soil Carbon and Nitrogen under Sugarbeet and Barley in Northern Great Plains. Proceedings of Great Plains Soil Fertility Conference. Proceedings of the Great Plains Soil Fertility Conference, March 7-8, 2006, Denver, Colorado. P. 286-291.
Jabro, J.D., Evans, R.G., Kim, Y., Stevens, W.B., Iversen, W.M. 2005. Spatial Variability of Apparent Electrical Conductivity and Cone Index As Measured with Sensing Technologies: Assessment and Comparison. In: 2005 Pacific Northwest Section Meeting, September 22-24, 2005, Lethbridge, Alberta, Canada. Paper Number Pnw05-017. St. Joseph, MICH.: ASAE. (PDF; 860 KB)