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1. Nitrogen and Sulfur Colimitation to Winter Wheat YieldSulfur has become more limiting for wheat production in the Great Plains, and its deficiency can interact with N availability. The current work reports on yield and yield gaps of three winter wheat varieties as affected by N and S fertilization using the concept of co-limitation (CNS). Field studies evaluating 0, 10, 20 and 40 lbs S/a combined factorials with 50, 100, and 150 lbs N/ac and three hard red winter wheat varieties were conducted in eight environments resulting from the... R. Lollato, B.R. Jaenich, N. Nelson, M. Guttieri, D. Ruiz diaz, V. Sadras |
2. Evaluation of Fertility Timing for Double Crop SoybeansDouble crop soybeans (Glycine max), or soybeans following a winter wheat (Triticum aestivum) crop are a popular choice for producers who are looking for a way to maintain field coverage through the summer and an opportunity to capture additional profit from their field. In Oklahoma, double crop soybeans have a lower success rate in a rain fed system due to the unpredictability of rainfall and the later planting date of the double crop soybeans. Because of this, producers traditionally treat the... R. Grant |