High‐Yielding Corn Response to Applied Phosphorus, Potassium, and Sulfur in Nebraska

By C. Wortmann, A. Dobermann, Richard B. Ferguson, G. Hergert, C. Shapiro, D. Tarkalson, D. Walters. 2009

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Potassium Fertilization on Maize under Different Production Practices in the North China Plain (2011, background): “In Nebraska, where maize yields oft en exceed 15 Mg ha–1 nowadays, K recommendations were based on research conducted when the mean maize grain yield was <5 Mg ha–1 (Wortmann et al., 2009).”
Maize Nutrient Accumulation and Partitioning in Response to Plant Density and Nitrogen Rate: I. Macronutrients (2013, background): “In addition, Wortmann et al. (2009) documented an average SIE of 636 kg kg–1 (high GY level, ?”
Grain Nitrogen Source Changes over Time in Maize: A Review (2013, result): “Similar results (for much smaller databases) were documented by Ciampitti (2012) and can be calculated from Wortmann et al. (2009, 2011) and Setiyono et al. (2010).”
Nitrogen Use Efficiency of Irrigated Corn for Three Cropping Systems in Nebraska (2011, background): “Th ese P and K rates were found to be adequate for optimal crop performance (Wortmann et al., 2009).”
Long term impact of tillage practices and biennial P and N fertilization on maize and soybean yields and soil P status (2012, background): “The lack of maize response to P fertilizers in conventionally tilled soils with adequate P is common to various soil types (Mallarino et al., 1991; Wortmann et al., 2009).”
Nitrogen Response and Economics for Irrigated Corn in Nebraska (2011, methodology): “Further discussion of response to P, K, and S is provided elsewhere (Wortmann et al., 2009).”