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1. Soil Acidification of Cultivated Fields in Semiarid Montana: Adaptation and Challenges to RemediationHistorically, soil acidification was not a problem in Montana because the parent material of most cultivated soils exhibited a neutral to an alkaline reaction. However, fertilizer ammonium‐N use (including urea) by farmers has grown tremendously in recent decades contributing to leading to a downward trend in soil pH and with incidences of soil acidity/Al toxicity now beginning to appear. Here we summarize the results from on-farm sugar beet lime trials to remediate soil acidity; seed-placed... R. Engel, C. Jones |
2. Nutrient Cycling Following Cover Crop Termination in Texas Cotton ProductionCover crop adoption on the Texas High Plains (THP) is severely limited compared to other agricultural regions in the U.S. Cotton producers on the THP consistently site water limitations as the primary reason for not implementing cover crops in their cropping systems. Previous research on the THP has shown that nitrogen immobilization following cover crop termination might be the most leading consequence of cover crops, not water availability. A study was initiated into existing long term... J.A. Burke, K.L. Lewis, J.L. Foster |
3. Post-Wheat Summer Cover Crop Effects Crop Yields and Soil Properties in a No-till Dryland Cropping SystemTraditional dryland cropping systems in the semi-arid Great Plains include long fallow periods of up to 14 months to conserve soil moisture. However, such systems are inefficient even under continuous no-till (NT) management. As less water is necessary to produce forage compared to grain, cover crops (CCs) may be successfully integrated into dryland crop rotations for increased soil cover and potentially greater income when hayed or grazed as annual forages. One study was initiated in 2016 near... L.M. Simon, A.K. Obour, J.D. Holman, M.E. Schipanski, S.K. Johnson, K.L. Roozeboom |
4. Dual-purpose Cover Crop and Occasional Tillage Effects on Crop Yields and Soil Properties in a No-tillage Wheat-sorghum-fallow RotationReplacing fallow with dual-purpose cover crops (CCs) could enhance soil health and increase cropping system profitability when CCs are grazed or hayed. Grazing and/or haying CCs can provide an economic benefit to offset potential lost revenue when grain crop yields are decreased after CCs in dry years. However, producers are concerned about the potential for root-limiting soil compaction following grazing on no-till (NT) fields, which could limit subsequent grain crop yields and require tillage... L. Simon, A. Obour, J. Holman, S.K. Johnson, K. Roozeboom |