Proceedings
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| Filter results4 paper(s) found. |
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1. Networks of Precision Farming Trials to Evaluate and Improve Nitrogen Management for CornMost research to improve nitrogen (N) management has been conducted at relatively few locations on experimental farms. The advent of precision farming technologies offers the potential for producers to collect data on their farms. The objective of this paper is to describe how organized networks of producers using precision farming technologies can evaluate and improve N management practices. Pairs of N management practices were evaluated across many fms. Treatments were applied in alternating... B.W. Van De Woestyne, A.M. Blackmer, T.M. Blackmer |
2. Can a Winter Rye Cover Crop Mitigate Nitrate Leaching from Corn Production on Irrigated Coarse Textured Soils?Minnesota has approximately 500,000 acres of irrigated coarse textured soils. These soils are very productive but are highly vulnerable to nitrate (NO --N) leaching and ground water contamination. In these soils, most of the NO --N leaching losses take place in early spring and late fall, when precipitation is high and crops have limited water and nutrient uptake. The objectives of this study are 1) quantify the capacity of rye (Secale cereal L.) as a cover crop to mitigate... N. Ricks, F. Fernandez, J. Baker |
3. Cover Crop and Nitrogen Fertilizer Rate Effects on Mitigating Soil Nitrate Leaching in Irrigated Sandy Soils in Corn and Soybean ProductionCoarse textured soils are very productive when supplemented with irrigation and nitrogen (N); however, they are susceptible to nitrate (NO3–N) leaching. Nitrate leaching not only reduces fertilizer efficiency but has costly environmental impacts to the groundwater supply. The majority of NO3–N loss occurs in the fall and spring or when nutrient and water uptake from corn (Zea mays L.) and soybean (Glycine max Merr. L.) is limited but precipitation is frequent.... N. Ricks, F. Fernandez |
4. No-till corn nitrogen recommendation using precision soil management practicesIn long-term no-till fields, South Dakota (SD) farmers reported a reduced fertilizer-nitrogen (N) requirement compared to conventional tillage to obtain optimum corn yield. Reduced fertilizer recommendation may be due to improved soil health resulting from increasing soil organic matter, higher soil microbial activities, and improved water and nutrient use efficiency over the years the no-till system is used. However, the impact of soil health measurements on fertilizer-N requirement has not been... D. Bhattarai, J. Clark, D. Clay |