Abstract
When four varieties of winter wheat (Yogo, Kharkov 22 M.C., Jones Fife, and Elgin) were sown into wheat, oat, or barley cover crops, the yields were lower than when they were sown on fallow. The yield of winter wheat sown into the different cover crops was highest in barley and lowest in wheat cover crop. When the growth of cover crops was abundant, the yield of winter wheat was reduced. Application of ammonium-phosphate-sulphate fertilizer (16-20-0) increased the yield of winter wheat and generally decreased the severity of common root rot. Winter survival was generally greater when winter wheat was sown into cover crops than when it was sown on fallow. Root rot was most severe in winter wheat sown into wheat cover and was progressively less severe when sown into fallow, barley, or oat cover. Neither blade-cultivating nor mowing the cover crop prior to seeding the winter wheat appreciably affected the yield.
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