Proceedings
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| Filter results3 paper(s) found. |
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1. Field Scale Evaluation of Innovative N Management Systems for CornPrevious research has shown that N fertilizer need for corn can vary widely, both between fields and within fields. Producers, however, almost always apply the same N fertilizer rate to whole fields, and vary N fertilizer rates minimally if at all over whole farms. Matching N fertilizer rates more closely to N needs could produce both economic and environmental benefits. Our objective is to test a range of innovative N management systems for their ability to match N rate recommendations to N needs... |
2. Soil Test Phosphorus and Potassium as Affected by Site Specific Soil Fertility ManagementThe overall objective of this field scaled study was to provide an in-field evaluation of common site specific fertilizer strategies used in corn 1 soybean production. While a team of researchers are working on several specific objectives, this work specifically focuses on three of them. First, to evaluate the variability in soil tests for making site specific phosphate (P) and potassium (K) application. Second, to measure the change in this variability over time as affected by fertilizer management... |
3. Recalibration of Potassium Requirements for Corn in North DakotaThe previous North Dakota potassium recommendations for corn were borrowed from central Corn Belt states, where the dry soil-based 1 M ammonium acetate extraction for soil test K was utilized with a critical K value of 150 ppm. This value was adequate before 2000 because corn production was limited to only a few counties in southeastern North Dakota, and soil test K values were commonly above 300 ppm. However, the intensification of corn production in these counties and an increasing acreage around... D. Franzen, J. Breker, M. Rakkar, A. Chatterjee |