Building a Maximum Yield Cropping System for Corn, Wheat and Double-cropped Soybeans


01 Mar 1999

1998 Annual Interpretive Summary

Building a Maximum Yield Cropping System for Corn, Wheat and Double Cropped Soybeans, 1998

A four crop/three year cropping system consists of no till soybeans in corn stubble, followed by minimum till wheat, no till soybeans, and then no till corn the third year. The goals of this study are to develop a systems management program that increases crop yield level, input efficiency and profit potential.

In the first year, the rotation improved corn yield by 14 bu/A and soybean yield by 5 bu/A. Specifically, full season soybeans in the new rotation yielded 37 bu/A. Corn yielded 174 bu/A in the new rotation system, while corn in the conventional corn/soybean rotation yielded 144 bu/A.

In 1996 Madison wheat yielded 107 to 110 bu/A under intensive nutrient management. No-till wheat with Baytan seed treatment planted after no-till soybeans or corn yielded from 102 to 107 bu/A. A record yield of wheat was harvested during 1997... 151 bu/A as compared with the Maryland state average of 60, the highest farmer yield of 85, and the highest previous research yield of 125.

Narrow row corn studies with two hybrids (P-3394 and SS 682 each at 28,900 final stand) showed a 7.2 percent yield increase with 15-inch rows (193 bu/A) as compared to 30-inch rows (180 bu/A).

In 1998 corn yield increased from 44 to 127 bu/A with the application of 120 lb N/A with no-till while yield increased from 39 to 124 bu/A with 160 lb N/A under conventional tillage. MD-06F