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1. Long-term Crop Rotation Impact on Soil Properties and Crop ResponseCrop rotations can be part of sustainable agriculture production by their effectiveness depends on understanding how crop rotations affect above- and below-ground crop characteristics. Objectives were to investigate crop rotation effects on shoot dry weight and root characteristics of cereal and grain legume crops at anthesis as well as on grain yield. Rotations were corn (Zea mays L.)-soybean [Glycine max (L.) Merr.], (CS); corn-soybean-spring wheat (Triticum aestivum L.)-field... S. Osborne, R. Lehman, W. Riedell, B. Chim |
2. Legacy Impacts of Cattle Grazing on Soil N2O and CH4 Fluxes in Shortgrass SteppeGrazing cattle directly emit CH4 from enteric fermentation and contribute to soil N gas emissions related to nitrogen and organic matter additions from urine and manure deposits. Grazed soils can be sources or sinks of CH4, depending on moisture levels and localized manure patches. N2O emissions are related to availability of water as well as mineral N and labile C substrates in soil. Previously, we observed higher N2O and NH3 losses from fresh patches of urine and manure compared to... S. Del Grosso, J. Derner, J. Delgado |
3. Stacking Regenerative Agricultural Practices Under Irrigated Forage ProductionIncorporation of forage production into producer landscapes is an opportunity to hedge economic risk and increase yield stability. Regenerative agricultural management practices that also reduce N fertilizer and pest control costs, recycle nutrients, and preserve and capture precipitation are needed in semi-arid regions. There is little information on how the combination of regenerative practices such as no-tillage (NT) and cover crops will influence the timing and effect (e.g., additive,... C.E. Stewart, D.K. Manter, S. Del Grosso, G. Miner, P. Kleinman |
4. The Past, Present, and Future of Soil TestingA keynote adress from Dr. Ray Ward, Founder of Ward Laboratories, Inc. ... R. Ward |
