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Synopsis: Leachable nitrogen was greatest in the first 3-week period and varied as follows: (NH4)2S04 = Urea > castor pomace > Milorganite > Uramite = Nitroform. In the 3- to 12-week period leachable nitrogen varied as: Uramite = Nitroform > castor pomace = Milorganite. Decreased soil acidity increased the leachable nitrogen from all materials in the first 3 weeks.
2 Departmental Fellow and former Professor in Agronomy (now Agronomist, Seabrook Farms, Seabrook, N. J.), University of Massachusetts.
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