In good years, his across-the-board corn yields average 200 bushels per acre or more. He is building a high-yielding no-till system that relies on manure application, in-furrow and in-row fertility treatments and accurate seed placement. “It went into the ground and was digested,” says Wolfskill, whose Mar-Anne Farms have been Wolfskill, who no-tills 1,800 acres of corn, soybeans, barley, alfalfa and wheat near Wernersville, Pa., broke through the 300-bushel yield barrier in corn last year for the first time. And by the fifth week, the manure was gone. By the second week, it was beginning to disappear. The first week, the manure was still there. He came back at 1-week intervals to see what would happen. Curious, Wolfskill grabbed some manure and spread it out between two cornrows. There was some soybean residue remaining, but a recent application of straw and manure had mysteriously disappeared.
A few years ago while planting double-crop soybeans, David Wolfskill got out of his tractor, walked into one of his adjacent cornfields and noticed the ground was completely bare.
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