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Research ArticleA Section

Optimum placement of phosphorus for corn/soybean rotations in a strip-tillage system

Gyles Randall and Jeffrey Vetsch
Journal of Soil and Water Conservation September 2008, 63 (5) 152A-153A; DOI: https://doi.org/10.2489/jswc.63.5.152A
Gyles Randall
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Jeffrey Vetsch
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Excerpt

Strip tillage, a conservation tillage system using very reduced tillage, is attracting much attention throughout the corn-growing regions of the United States. In the northern parts of the Corn Belt, strip tillage often replaces no-till systems on the more poorly drained soils because it provides a warmer tilled seedbed for early planting and faster early growth while maintaining substantial amounts of erosion-minimizing plant residue between the tilled strips. Another benefit of strip tillage is the need for only one field operation between soybean harvest and spring planting—that is, fall strip tillage accompanied by deep-placement of fertilizer phosphorus (P) and potassium (K) in a band 15 to 18 cm (6 to 7 in) deep in the strip. No preplant tillage is needed. From an environmental perspective, deep-band placement is considered to be ideal in terms of eliminating nutrient stratification and reducing the potential for surface runoff of fertilizer P, which can easily occur when fertilizers are broadcasted on the soil surface of no-till systems. From an agronomic perspective, fertilizer placement 10 to 13 cm (4 to 5 in) directly below where the seed will be planted is thought to be ideal in terms of fertilizer P and K use efficiency, early …

Footnotes

  • Gyles Randall is a soil scientist and professor and Jeffrey Vetsch is an assistant scientist at the Southern Research and Outreach Center, University of Minnesota, Waseca, Minnesota.

  • © 2008 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 63 (5)
Journal of Soil and Water Conservation
Vol. 63, Issue 5
September/October 2008
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Optimum placement of phosphorus for corn/soybean rotations in a strip-tillage system
Gyles Randall, Jeffrey Vetsch
Journal of Soil and Water Conservation Sep 2008, 63 (5) 152A-153A; DOI: 10.2489/jswc.63.5.152A

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Optimum placement of phosphorus for corn/soybean rotations in a strip-tillage system
Gyles Randall, Jeffrey Vetsch
Journal of Soil and Water Conservation Sep 2008, 63 (5) 152A-153A; DOI: 10.2489/jswc.63.5.152A
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