Proceedings :: North Central Soil Fertility Conference

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Hergert, G

Pierzynski, G.M

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Authors

Janssen, K.A

Pierzynski, G.M

Barnes, P.L

Dobermann, A

Ferguson, R

Hergert, G

Shapiro, C

Tarkalson, D

Walters, D

Wortmann, C

Topics

Type

Oral

Year

1996

2006

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Filter results2 paper(s) found.
1. Phosphorus Losses in Runoff Water as Affected by Tillage and Phosphorus Fertilization Phosphorus (P) in runoff from cropland can contribute to nutrient enrichment and eutrophication of surface water bodies. Research was continued during 1996 to determine which tillage systems and which methods of applying P fertilizer will result in the least P losses in runoff water for grain sorghum production under somewhat poorly drained soil conditions in east-central Kansas. The tillage systems evaluated were a chisel-disk-field cultivate system, a ridge-till system, and a no-till system. Fertilizer... Download paper
2. Should We Abandon Soil Testing and Yield Goals in Estimating Nitrogen Rates for Corn If the prices of corn and fertilizer-N and the shape of the N response function relating crop yield to the amount of fertilizer used are known, calculating an economically optimal N rate (EONR) for maximizing the net return to applied N is straightforward: the EONR is the N rate at which no firher increase in net return occurs. In most cropping systems and under common price scenarios, crop yield at the EONR is within 95 to 99% of the maximum yield obtained for the specific management package. In... Download paper

Filter results2 paper(s) found.

1. Phosphorus Losses in Runoff Water as Affected by Tillage and Phosphorus Fertilization

Phosphorus (P) in runoff from cropland can contribute to nutrient enrichment and eutrophication of surface water bodies. Research was continued during 1996 to determine which tillage systems and which methods of applying P fertilizer will result in the least P losses in runoff water for grain sorghum production under somewhat poorly drained soil conditions in east-central Kansas. The tillage systems evaluated were a chisel-disk-field cultivate system, a ridge-till system, and a no-till system. Fertilizer...

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2. Should We Abandon Soil Testing and Yield Goals in Estimating Nitrogen Rates for Corn

If the prices of corn and fertilizer-N and the shape of the N response function relating crop yield to the amount of fertilizer used are known, calculating an economically optimal N rate (EONR) for maximizing the net return to applied N is straightforward: the EONR is the N rate at which no firher increase in net return occurs. In most cropping systems and under common price scenarios, crop yield at the EONR is within 95 to 99% of the maximum yield obtained for the specific management package. In...

Download paper