Proceedings :: North Central Soil Fertility Conference

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Cates, A

Culpitt, M

Cummins, G

Combs, S.M

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Authors

Kelling, K.A

Schulte, E.E

Bundy, L.G

Combs, S.M

Peters, J.B

Sawyer, J.E

Lang, B

Barker, D.W

Cummins, G

Topics

Type

Oral

Year

1990

2009

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Filter results2 paper(s) found.
1. The New Wisconsin Soil Test Recommendation Program The modern Wisconsin soil testing program was originally developed in the early 1960's. It was revised rather thoroughly in 1970 and again in 1981. New research advances, additional correla- tion and calibration data, changes in user needs, and shifts in philosophical viewpoint make it necessary to periodically review the soil testing program and the recommendations that emanate from that program. The current revision is an attempt to incorporate additional research, eliminate certain inconsistencies... Download paper
2. Dealing with Sulfur Deficincies in Crop Production: The Iowa Experience Research conducted for more than forty years (pri or to approximately 2005) in Iowa rarely noted improved crop yield with sulfur (S) fertilization. Studies during that time period with corn and soybean found yield increase from S fertilizer application only three times out of approximately 200 trials. Research in the early 1980's had also documented sufficient plant available S in the soil profile for crop production on most Iowa soil associations. Results of recent studies (2000- 2005) in corn and... Download paper

Filter results2 paper(s) found.

1. The New Wisconsin Soil Test Recommendation Program

The modern Wisconsin soil testing program was originally developed in the early 1960's. It was revised rather thoroughly in 1970 and again in 1981. New research advances, additional correla- tion and calibration data, changes in user needs, and shifts in philosophical viewpoint make it necessary to periodically review the soil testing program and the recommendations that emanate from that program. The current revision is an attempt to incorporate additional research, eliminate certain inconsistencies...

Download paper

2. Dealing with Sulfur Deficincies in Crop Production: The Iowa Experience

Research conducted for more than forty years (pri or to approximately 2005) in Iowa rarely noted improved crop yield with sulfur (S) fertilization. Studies during that time period with corn and soybean found yield increase from S fertilizer application only three times out of approximately 200 trials. Research in the early 1980's had also documented sufficient plant available S in the soil profile for crop production on most Iowa soil associations. Results of recent studies (2000- 2005) in corn and...

Download paper