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                    U.S. DEPARTMENT OF AGRICULTURE
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William M Iversen

(Bill)    Physical Scientist   Bill IversenWilliam "Bill" M. Iversen **Physical Scientist**  bill.iversen@ars.usda.gov www.ars.usda.gov/pa/nparl/biversen  Phone: 406.433.9417Fax: 406.433.5038 • Education• Experience• Publications •   **Additional Page:****Publications********Taken from the Agricultural Research Information System (ARIS) database. **EDUCATION**  A.S.
1974
Engineering TechnologyA.S.
1974
Electronics TechnologyA.S.
1975
Electrical TechnologyB.T.
1975
ElectronicsB.S.
1975
Vocational - Technical Education **EXPERIENCE**  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.  **SELECTED PUBLICATIONS**Please note: The most recent publications by this scientist may not yet be listed here. Please check the ARIS "Publications" page for possible new titles. Jabro, J.D., Stevens, W.B., Iversen, W.M., Sainju, U.M., Allen, B.L. 2023. Saturated hydraulic conductivity of a sandy loam under no-till and intensive tillage in a corn-soybean rotation. Soil Systems. 7,79. https://doi.org/10.3390/soilsystems7030079.
Jabro, J.D., Stevens, W.B., Iversen, W.M., Sainju, U.M., Allen, B.L. 2021. Soil cone index and bulk density of a sandy loam under no-till and conventional tillage in a corn-soybean rotation. Soil & Tillage Research. 206:Article e104842. https://doi.org/10.1016/j.still.2020.104842.
Nilahyane, A., Chen, C., Keshavarz, R., Stevens, W.B., Iversen, W.M. 2020. Deficit irrigation for sugarbeet under conventional and no-till production. Agrosystems, Geosciences & Environment. 3(1). Article e20114. https://doi.org/10.1002/agg2.20114.
Sainju, U.M., Lenssen, A.W., Allen, B.L., Jabro, J.D., Stevens, W.B., Iversen, W.M. 2020. Soil water and water-use efficiency with diversified crop rotations and cultural practices. Agronomy Journal. 112(5):3306-3321. https://doi.org/10.1002/agj2.20332.
Jabro, J.D., Stevens, W.B., Iversen, W.M. 2020. Comparing two methods for measuring soil bulk density and moisture content. Open Journal of Soil Science. 10(6):233-243. https://doi.org/10.4236/ojss.2020.106012.
Jabro, J.D., Stevens, W.B., Iversen, W.M., Allen, B.L., Sainju, U.M. 2020. Irrigation scheduling based on wireless sensors output and soil-water characteristic curve in two soils. Sensors. 20(5):1336. DOI: 10.3390/s20051336.
Jabro, J.D., Iversen, W.M., Stevens, W.B., Sainju, U.M., Allen, B.L. 2019. Tillage effects on drainage fluxes and nitrate leaching through unsaturated zone under irrigated corn-soybean rotation. Applied Engineering in Agriculture. 35(3):293-300.DOI: 10.13031/aea.13127.
Stevens, W.B., Iversen, W.M., Jabro, J.D. 2019. Nitrogen fertigation interval for sugarbeet grown on soils with a high leaching potential. Journal of Sugar Beet Research. 56(1-2):21-34.
Jabro, J.D., Iversen, W.M., Stevens, W.B., Allen, B.L., Sainju, U.M. 2017. A new automated passive capillary lysimeter for logging real-time drainage water fluxes.Applied Engineering in Agriculture. 33(6):849-857. DOI: 10.13031/aea.12433.
Jabro, J.D., Stevens, W.B., Iversen, W.M. 2017. Field performance of three real-timemoisture sensors in sandy loam and clay loam soils. Archives of Agronomy and SoilScience. 64(7):930-938. DOI: 10.1080/03650340.2017.1393528.
Jabro, J.D., Iversen, W.M., Stevens, W.B., Evans, R.G., Mikha, M.M., Allen, B.L. 2016.Physical and hydraulic properties of a sandy loam soil under zero, shallow and deeptillage practices. Soil & Tillage Research. 159:67–72.
Jabro, J.D., Stevens, W.B., Iversen, W.M., Allen, B.L., Sainju, U.M. 2016. Suction cupsamplers for estimating nitrate-nitrogen in soil water in irrigated sugarbeetproduction. Soil Science. 7(10):1342-1354.DOI: 10.4236/jep.2016.710117.
Jabro, J.D., Iversen, W.M. 2015. Nondestructive analysis of three-dimensional objectsusing a fluid displacement method. Soil Science Society of America Journal. 79:1289-1292. DOI: 10.2136/sssaj2015.06.0215.
Jabro, J.D., Iversen, W.M., Stevens, W.B., Evans, R.G., Mikha, M.M., Allen, B.L. 2015.Effect of three tillage depths on sugarbeet response and soil penetrability resistance.Agronomy Journal. 107(4):1481-1488. DOI: 10.2134/agronj14.0561.
Jabro, J.D., Stevens, W.B., Iversen, W.M., Evans, R.G. 2015. Spatial and temporalvariability of soil penetration resistance transecting sugarbeet rows and inter-rows intillage systems. Agronomy Journal. 31(2):237-246. DOI: 10.13031/aea.31.10722.
Stevens, W.B., Sainju, U.M., Caesar, T., Iversen, W.M. 2015. Malt barley yield andquality affected by irrigation, tillage, crop rotation, and nitrogen fertilization.Agronomy Journal. 107(6):2107-2119. DOI: 10.2134/agronj15.0027.
Stevens, W.B., Evans, R.G., Iversen, W.M., Jabro, J.D., Sainju, U.M., Allen, B.L. 2015. Strip tillage and high-efficiency irrigation applied to a sugarbeet- barley rotation. Agronomy Journal. DOI: 10.2134/agronj14.0525.
Jabro, J.D., Iversen, W.M., Evans, R.G., Allen, B.L., Stevens, W.B. 2014. Repeated freeze-thaw cycle effects on soil compaction in a clay loam in northeastern Montana.Soil Science Society of America Journal. 78(3): 737-744. DOI: 10.2136/sssaj2013.07.0280. (PDF)
Jabro, J.D., Stevens, W.B., Iversen, W.M., Evans, R.G., Allen, B.L. 2014. Crop water productivity of sugarbeet as affected by tillage. Agronomy Journal. 106(6):2280-2286. (PDF)
Lenssen, A.W., Sainju, U.M., Jabro, J.D., Iversen, W.M., Allen, B.L., Evans, R.G. 2014. Crop diversification, tillage, and management system influences on spring wheat yield and soil water use. Agronomy Journal. 106(4):1445-1454. DOI: 10.2134/agronj14.0119. (PDF)
Sainju, U.M., Stevens, W.B., Evans, R.G., Iversen, W.M. 2013. Irrigation system and tillage effects on soil carbon and nitrogen fractions. Soil Science Society of America Journal. 77(4):1225-1234. (PDF)
Qi, Z., Bartling, P.N., Jabro, J.D., Lenssen, A.W., Iversen, W.M., Ahuja, L.R., Ma, L., Allen, B.L., Evans, R.G. 2013. Simulating dryland water availability and spring wheat production under various management practices in the Northern Great Plains. Agronomy Journal. 105:37-50.  (PDF; 1763 KB)
Evans, R.G., Iversen, W.M., Kim, Y. 2012. Integrated decision support, sensor networks and adaptive control for wireless site-specific sprinkler irrigation. Applied Engineering in Agriculture. 28(3):377-387.
Jabro, J.D., Iversen, W.M., Evans, R.G. 2012. Performance evaluation and accuracy of passive capillary samplers (PCAPs)for estimating real-time drainage water fluxes. Applied Engineering in Agriculture. 18(4):537-542.
Jabro, J.D., Iversen, W.M., Evans, R.G., Stevens, W.B. 2012. Water use and water productivity of sugarbeet, malt barley and potato as affected by irrigation frequency. Agronomy Journal. 104(6):1510-1516.
Lenssen, A.W., Iversen, W.M., Sainju, U.M., Caesar, T., Blodgett, S.L., Allen, B.L., Evans, R.G. 2012. Crop yield and quality, weeds, insects, and water use of durum and selected brassicaceae oilseeds in two-year rotations. Agronomy Journal. 104:1295-1304.
Jabro, J.D., Stevens, W.B., Iversen, W.M., Evans, R.G. 2011. Bulk density, water content and hydraulic properties of a sandy loam soil following conventional or strip tillage. Applied Engineering in Agriculture. 27(5):765-768. (PDF; 123 KB)
Stevens, W.B., Evans, R.G., Jabro, J.D., Iversen, W.M. 2011. Sugarbeet productivity as influenced by fertilizer band depth and nitrogen rate in strip tillage. Journal of Sugarbeet Research. 137-154. (PDF; 256 KB)
Abou-Najm, M., Jabro, J.D., Iversen, W.M., Mohtar, R., Evans, R.G. 2010. New Method for the Characterization of 3D Preferential Flow Paths at the Field. Water Resources Research. Vol. 46, W02503. (PDF; 2555 KB) doi:10.1029/2009WR008594.
Chavez Eguez, J.L., Pierce, F.J., Elliott, T.V., Evans, R.G., Kim, Y., Iversen, W.M. 2010. A remote irrigation monitoring and control system (RIMCS) for Continuous Move Systems. Part B: Field Testing and Results. Precision Agriculture. 11(1):11-26. (PDF; 922 KB)
Evans, R.G., Iversen, W.M., Kim, Y. 2010. Integrated Decision Support, Sensor Networks and Adaptive Control for Wireless Site-specific Sprinkler Irrigation. National Irrigation Symposium. Phoenix, AZ. Dec 5-8. ASABE CDROM.
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) Back to Top


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