Proceedings
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| Filter results3 paper(s) found. |
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1. Identification of Reasons for High Temporal Soil-Test Potassium VariationExtensive research has focused on potassium (K) fertlization and soil K testing during several decades in the Corn Belt. IN Iowa, more t han 200 conventional or on-farm strip trials were conducted since the iddle 1990s until the early 2000s. Results of this research were used to update Iowa State University (ISU) K recommendations in 1999 and in 2002. In spite of increasd knowledge about soil-test K calibration, K fertilizer placement meethods, and needed K fertilizer rates, this research demonstrated... |
2. Phosphorus and Potassium Removal and Leaching from Residue in Corn and SoybeanResearch is continually being conducted to adjust and update recomm endations for phosphorus (P) and potassium (K), and to be tter understand relationships betw een nutrient application, grain yield, nutrient removal with harvest, and soil-test values. Studies in Iowa and other states of the north central region have been used to develop guidelines about P and K removal rates in corn and soybean for use together with soil testing information to manage P and K. There is very large temporal variability... |
3. Use of Biostimulants for Increased Nutrient Uptake in Maize ProductionBiostimulants are becoming popular in the agricultural market as products to increase growth, health, and/or yield of crop plants. These products differentiate themselves from traditional plant growth regulators as they impact crop growth and development indirectly through mitigation of crop stress and/or greater nutrient availability and uptake. The challenge in working with these products is that there are many types of biostimulants, each with unique mechanisms of action. The objective of this... C.N. Sible, F.E. Below |