Proceedings
Authors
| Filter results6 paper(s) found. |
|---|
1. Topsoil Thickness Effects on Phosphorus and Potassium Dynamics on Claypan SoilsDue to variable depth to claypan (DTC) across landscapes, nutrient supply from subsoils, and crop removal, precise P and K fertilizer management on claypan soil fields can be difficult. Therefore, a study was performed to determine if DTC derived from soil apparent electrical conductivity (ECa) could be used to improve P and K management for corn (Zea mays L.) and soybean (Glycine max [L.]). Research was conducted on a claypan soil at the University of Missouri’s... L. Conway, M. Yost, N. Kitchen, N. Kitchen, K. Sudduth |
2. Do Soil Nitrogen Tests Relate to Nitrogen Mineralization in First-year Corn Following Alfalfa?Corn (Zea mays L.) is the most frequent first-year crop grown following alfalfa (Medicago sativa L.) in the Upper Midwest. In the majority of cases, first-year corn does not respond to fertilizer N, but sometimes large amounts are needed to optimize yield. The pre-sidedress and Illinois soil N tests (PSNT and ISNT, respectively) are early-season tests used to predict corn yield response to fertilizer N. These tests measure specific fractions of soil N and define a critical concentration to separate... |
3. Consequences Of Shallow NH3 Placement And Timing On N Use Efficiencies In Corn ProductionA field study in west-central Indiana was conducted to investigate the effects of shallow anhydrous ammonia (NH 3) placement and timing on N use efficiencies in a conventionally tilled corn production system following soybean crop. The spring NH 3 was applied either pre-plant (6- inches offset from future corn row) or side-dress (at mid-row position) at different rates (0, 80, 130 or 180 lbs N acre -1). Aboveground biomass harvest and combine harvested yield were used to determine N recovery, N internal... |
4. Searching for Inputs to Increase Soybean YieldCommodity prices and production costs are both at higher levels than in prior periods, encouraging growers to maximize returns by managing costs and raising yields. We conducted experiments at three Illinois sites in 2012 to evaluate foliar fertilizer, foliar insecticide, lactofen herbicide, seed treatment, foliar fungicide, foliar fungicide + foliar insecticide, cytokinin, , and fertilizer N, alone or in combinations of factors, including some deletion' treatments. Serious drought through the first... |
5. Agronomic and Nutrient Management Strategies for Soft Red Winter WheatMichigan produces some of the greatest non-irrigated wheat (Triticum aestivum L.) yields in the United States. Enhancing or lengthening the greenness of the flag-leaf has been suggested as a method to improve photosynthetic capabilities and nutrient uptake. The objective of this study was to evaluate growth, grain quality, grain yield, and economic profitability for multiple agronomic and nutrient inputs across different production intensity levels. An omission field trial with four replications... S. Purucker, K. Steinke |
6. Evaluation of soybean response to in-season potassium fertilizationIn-season application of potassium (K) fertilizer may offer an alternative to remediate deficiencies developed during the growing season. The objective of this study was to determine soybean (Glycine max) response to topdress K application timing under deficient soil conditions. Treatments included a control (0 lbs K2O acre-1), 50 lbs K2O acre-1 pre-plant incorporated, and 50 lbs K2O acre-1 in-season broadcasted at the... D.A. Charbonnier, D.A. Ruiz diaz, M.A. Coelho |