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1. Observational and Modeling Methods to Inform Ecosystem Service MarketsInterest in quantifying the impacts of land management on ecosystem services has grown as governments, environmental organizations, and corporations have pledged to reduce greenhouse gas emissions, nutrient leaching, and other environmental impacts of human activities. Ecosystem service markets were formalized in the 1990s and originally deployed to mitigate point sources of air and water pollution. Associated protocols were fairly simple and easy to implement because quantification of point sources... S.J. Del Grosso, J. Delgado, D. Manter, C. Stewart, M. Vigil |
2. Mixing Wheat Seed with Fertilizer in the Drill: Seedling Injury and Wheat ResponseMixing dry phosphorus fertilizer with winter wheat seed is common in Kansas to provide a starter fertilizer benefit to the crop. This study was designed to evaluate the effects of dry phosphorus (P) sources, rates and times fertilizer mixed with wheat seed, effects on early growth and overall productivity and yield of the crop. Two winter wheat studies were conducted in the 2018-2019 wheat growing season at Manhattan (Site 1) and Topeka (site 2) in Northeast Kansas. The previous crop for site... C. Weber, D. Ruiz Diaz |
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. Can Soil Health Metrics Improve Standard Soil Fertility Recommendations?It is commonly speculated that integrating soil health (SH) testing with soil fertility (SF) testing would improve fertilizer recommendation decisions. However, quantified impacts of SH properties, specifically soil biological properties, on fertilizer demand have not been well established. The objective of this research was to explore corn (Zea mays L.) yield response to phosphorus (P) and potassium (K) fertilization as influenced by established SF analysis and common SH metrics.... N.R. Kitchen, J.D. Svedin, S.H. Anderson, K.S. Veum, C.R. Ransom |
5. Soil Test Methods and Tissue Analysis to Assess Winter Wheat Response to Sulfur Fertilizer SourcesIdentifying how winter wheat responds to sulfur (S) fertilization through the use of soil test S (STS) methods has been a challenge across Kansas soils. The objective of this study was to evaluate soil test extraction methods for S as well as plant S nutritional status using different S fertilizer sources and rates. Sulfur response trials were established at 24 Kansas locations during two years (2019 and 2020). Fertilizer rate treatments included a control with... D. Ruiz Diaz, C. Weber |