Michigan State University Extension
Soils & Soil Management - Fertilizer - 06039715
07/10/97
Tri-state Fertilizer Recommendations for Corn, Soybeans, Wheat and Alfalfa Extension Bulletin E-2567 (New), July 1995
M.L. Vitosh, Michigan State University; J.W. Johnson, The Ohio State University; D.B. Mengel, Purdue University; Co-editors
The following N recommendations for wheat (Vis. 10) assume that the crop is planted during the optimum planting period on mineral soils with 1 to 5 percent organic matter and either good natural or improved drainage, and that proper cultural practices are utilized.
Additional Comments
1. Recommended N rate is based on the relationship:
N (lb./acre) = 40 + (1.75 x (yield potential - 50))
2. No credits are given for the previous crop. Consult individual state recommendations concerning credits for organic waste materials such as manure.
3. Apply 15 to 30 lb. N/acre at planting and the remainder near green-up in spring; or, apply all N at planting as anhydrous ammonia plus a nitrification inhibitor injected on 15-inch or narrower row spacing.
4. To prevent serious lodging on high organic matter soils (greater than 20 percent organic matter), reduce the N rate by 30 to 50 lb. N/acre.
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| Total nitrogen recommendations for wheat based on yield potential - 8K |
