Tuesday, November 6, 2007
223-10

Crop Rotation and Seasonal Effects on Amino Sugar-Nitrogen Test Values in the Humid Southeast.

David Wall1, P. Randall Weisz1, Carl Crozier2, Jeffrey White3, and Ronnie Heiniger1. (1) North Carolina State University, N.Carolina State University, Dept. of, Crop science, Box 7620, Raleigh, NC 27695, (2) N. C. State University-Soil Science Dept., 207 Research Station Road, Vernon James Research & Extension Ctr., Plymouth, NC 27962, (3) Box 7619, North Carolina State University, North Carolina State University, Department of Soil Science, Raleigh, NC 27695-7619

The amino sugar-N test (ASNT)has shown potential for predicting in season N needs for corn and wheat. This test measures amino sugar-N (ASN) which is correlated to crop N uptake. As with any soil nutrient test its ability to predict plant nutrient availability over the growing season depends on the behavior of the nutrient over time. The objective of this study was to assess the variability in ASNT values over time for a wheat-soybean-corn rotation in the humid southeast. This study was conducted on ten sites over the course of a complete cropping cycle.

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