A preliminary look at the potential for variable rate fertilization for rolling land in the Brown Soil Zone
Date
1998-02-19
Authors
McConkey, B.G.
Nybo, B.
Dormer, S.
Liang, B.
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We are reporting on one year of results of an experiment to evaluate the potential for variable rate application of N, P, and seed to increase the economic returns for stubble-seeded spring wheat on rolling landscapes in the Brown soil zone. There was little yield response to either P or seeding rates and no important differences in the response by landscape position. There was a good yield response to N and the response was greater on the lower slopes than the upper slopes. However, a simple economic analysis showed that there was no economic advantage to varying the N rate by landscape position and, in fact, an economic disadvantage to varying N rate when using a single N-P fertilizer blend.
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Soils and Crops Workshop