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1. Assessment of Long-term Effects of Tillage and Nitrogen Management Practices on Irrigated Corn Yields and Nitrogen Use EfficienciesCorn grain yields and crop nitrogen uptake are affected by management factors such as tillage intensity and nitrogen rates. Additional data about the long-term effects of tillage and nitrogen rates on yields and nitrogen use efficiencies of irrigated corn are needed. We are presenting preliminary results from a 17-year study about the effects of these management practices on irrigated corn yields and nitrogen uptake in a Fort Collins clay loam soil at Colorado State University’s Agricultural... J.A. Delgado, A. Halvorson, A. Villacis-aveiga, S. Del Grosso, C. Stewart, D. Manter, J. Alwang, B. Floyd, R. D'adamo, G. Miner |
2. Effects of Climate Change and Narrow Rows with Higher Plant Densities on Yields of Irrigated CornClimate change is significantly impacting agricultural systems worldwide, and although there are reports of these impacts contributing to higher yields in some regions, the general consensus is that there will be negative impacts on yields and soil quality across large regions. Management practices that can contribute to higher yields and adaptation to a changing climate will be important during the 21st century. This presentation will cover results from two manuscripts that are currently... J.A. Delgado, B. Floyd, R. D'adamo, A. Villacis, A.D. Brandt, A. Halvorson, C.E. Stewart, J. Alwang, S. Del Grosso, D.K. Manter |
3. Increasing Winter Wheat Grain Yield By Replicating the Management Adopted in High-Yielding Commercial FieldsLarge winter wheat (Triticum aestivum) yield gaps between farmer yields and yield potential in the southern Great Plains indicate the need to improve recommendations of best management strategies to profitably bridge this gap. Many studies have been completed on individual management factors pre-determined by the individual researcher, but we are not aware of studies comparing combination of practices that producers are currently using, which would be more relevant for real-world scenarios.... L.P. Ryan, R.P. Lollato, L. Haag, J. Holman |
4. Sheep Grazing Preference and Nutrient Cycling Implications Among Cover Crop SpeciesThe vast and interspersed livestock and crop industries of Texas lend opportunity for livestock integration to benefit regional agricultural systems. Texas leads sheep production in the U.S. and small ruminant integration in crop systems has become an appealing opportunity in recent years due to strong meat markets and generally poor commodity crop markets. Many winter cover crops are likely suitable forages, and challenges of nutrient immobilization could be (at least partially) mitigated by... R. Matschek, R. Noland, N. Nielson, J. Thorne, M. Mcculloch |
5. Monitoring Nitrogen Transformations and Their Interaction with Potassium Uptake in Cotton Production SystemsUnderstanding the temporal dynamics of soil nitrogen (N) is critical for optimizing nutrient management in cotton production. This research monitored soil N transformations, specifically ammonium (NH₄⁺) and nitrate (NO₃⁻), throughout the cotton growing season. An additional focus was also placed on interactions between soil N forms and the uptake of essential plant nutrients, particularly potassium (K). Soil samples were collected at multiple depths and time points across different management... J. Derrick, B. Arnall, N. Mathey, B. Oliveira Liberato, C. Camacho |