Proceedings :: North Central Soil Fertility Conference

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Bollero, G.A

Reid, D.K

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Authors

Ruffo, M.L

Bollero, G.A

Bullock, D.S

Bullock, D.G

Reid, D.K

Bohner, H

Hall, B

Stewart, G

Topics

Type

Oral

Year

2003

2010

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Filter results2 paper(s) found.
1. Field Scale Variability of Corn Yield response Functions to Fertilizer Nitrogen Application Variable rate nitrogen (N) application assumes that corn response to N fertilizer varies within a field. However, this hypothesis has not been formally tested yet. Field variation of corn response to N fertilizer and economically optimum N fertilizer rates (EON) were assessed in on- farm experiments throughout central Illinois. Fields (16 to 32 ha.) were subdivided into 13 to 20 areas. Five nitrogen rates were randomized within these areas in 28 kg N increments (2 rates) and decrements (2 rates)... Download paper
2. A Smorgasbord of Preliminary Results from Field Trials in Ontario Field scale trials may be established to support lo cal needs, but the results seldom reach a wider audience. This paper summarizes two recent fiel d studies by staff of the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) on fertilizer use in soybeans and corn. A study of starter fertilizer response in soybeans found that yield responses to fertilizer tended to be relatively small, and seldom large enough to cove r the cost of the added fertilizer. A second study of ammonia volatilization... Download paper

Filter results2 paper(s) found.

1. Field Scale Variability of Corn Yield response Functions to Fertilizer Nitrogen Application

Variable rate nitrogen (N) application assumes that corn response to N fertilizer varies within a field. However, this hypothesis has not been formally tested yet. Field variation of corn response to N fertilizer and economically optimum N fertilizer rates (EON) were assessed in on- farm experiments throughout central Illinois. Fields (16 to 32 ha.) were subdivided into 13 to 20 areas. Five nitrogen rates were randomized within these areas in 28 kg N increments (2 rates) and decrements (2 rates)...

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2. A Smorgasbord of Preliminary Results from Field Trials in Ontario

Field scale trials may be established to support lo cal needs, but the results seldom reach a wider audience. This paper summarizes two recent fiel d studies by staff of the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) on fertilizer use in soybeans and corn. A study of starter fertilizer response in soybeans found that yield responses to fertilizer tended to be relatively small, and seldom large enough to cove r the cost of the added fertilizer. A second study of ammonia volatilization...

Download paper