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A summary of placement and fall versus spring application of nitrogen fertilizers
In 52 field experiments since 1973-74, the yield of barley grain without N averaged 1570 kg/ha, but the yield was increased by fall and spring application of incorporated urea (56 kg N/ha) to 2540 and 3470 kg/ha, respectively. ...
Unconventional methods of fertilizer placement to reduce losses of fall applied nitrogen
In two field experiments conducted in 1978-79, fall application of incorporated urea, or banded aqua ammonia, produced much less increase in yield and N-uptake than did spring application for barley grain. However, when ...
The rate of oxidation of elemental sulphur fertilizers
Uncropped field experiments were begun in June, 1979, and continued from 12 to 15 weeks after the addition of sulphur fertilizer on three soils, to determine the rate of conversion of elemental sulphur to soluble sulphate. ...