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Walters, D.T
Villamil, M
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Authors
Adams, M
Behke, G
Nafziger, E
Villamil, M
Walters, D.T
Topics
Type
Oral
Year
2015
2003
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1. Measuring Soil Quality Changes in Corn and Soybean Rotations

Soil quality is described as the ability of the soil to sustain crop growth and development along with nutrient cycling and water infiltration and retention. One possible strategy to maintain or increase soil quality is crop rotation. Crop rotations have the potential to increase crop yields, disrupt diseaseand pest cycles, and when a legume is added to the rotation, reduce nitrogen fertilizer requirements. Although the long-term productivity and sustainability of agriculture are dependent on maintaining... M. Adams, G. Behke, E. Nafziger, M. Villamil

2. Diagnosis of Nitrogen Deficiency in Maize and the influence of Hybrid and Plant Density

The precise diagnosis of maize N status has proven to be a difficult task because of annual 1 variation in internal N-use efficiency (kg grain kg- N uptake) and temporal change in N concentration in plant tissue. Analysis of leaf N concentration (g N leaf) has not been a consistently successful N diagnostic because of temporal and hybrid differences in specific leaf weight (SLW=g leaf me2 leaf). An alternative N diagnostic; specific leaf nitrogen (g N m-2 leaf), is unrelated to leaf mass. Maximum...