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Jones, J.D
Ashford, O.D
Asebedo, A.R
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Ashford, O.D
Asebedo, A.R
Tucker, A.N
Mengel, D.B
Jones, J.D
Laboski, C.A
Andraski, T.W
Jones, J.D
Laboksi, C.A
Arriaga, F.J
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1. Comprehensive Nutrient Management Plan from a USDA Perspective

Livestock manure has emerged over the past few years as a major political, as well as an environmental issue. As the Congressional Research Service described the situation in a May 1998 report: "Social and political pressure to address the environmental impacts of livestock production has grown to the point that many policy-makers today are asking what to do, not whether to do something." It added: "The bulk of current policy debate on animal waste issues, both legislative and regulatory, is occurring...

2. Recoverable Yield: A New Component for Improving Algorithms Used For Sensor Based Nitrogen Management In Wheat

Increased interest in N management over the past decade has stimulated interest in using optical sensors to predict N needs in a number of crops. Many universities have created N recommendation algorithms for winter wheat, with slightly differing approaches. While many university algorithms operate under the assumption that 100% of the yield potential difference between the N rich strip and the farmer practice can be recovered, we believe that this will not always be possible. The objective of this...

3. Nitrogen Timing Fertilization Strategies for Winter Wheat in Wisconsin

Economically optimum winter wheat (Triticum aestivum L.) production relies on effective N application rate and timing. Previous research in Wisconsin indicates a need to better understand winter wheat response to N rate and application timing for growing conditions specific to the state. This study evaluated the effect of N application timing on yield, economic optimum N rate (EONR), agronomic N use efficiency (NUE), and profitability. A three-year study was conducted at three locations... J.D. Jones, C.A. Laboski, T.W. Andraski

4. Effects of Soil Phosphorus and Potassium Levels on Corn Yield Response to Nitrogen Fertilization, Nitrogen Use Efficiency, and Profitability

Annual investment in nitrogen (N) fertilizer for corn production represents a significant portion of annual input costs. Yield response to N fertilization is affected by soil N supply, crop N demand, and interacting factors that affect crop N use, such as phosphorus (P) and potassium (K) supply. To investigate the effects of soil-test P and K levels on corn yield response to N fertilizer, a four-year study was conducted at two southern Wisconsin sites. Soil-test P and K were maintained at low,... J.D. Jones, C.A. Laboksi, F.J. Arriaga