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Research Article
Vol. 35, Issue 1
The vertical mobility of nitrogen with poultry and sheep manures amendment on degraded Ultisols in Owerri, Southeastern Nigeria
A randomized complete block design experiment was conducted for two years, two locations per year and three months per location with three replications. The rates of dried, milled pure poultry and sheep manures incorporated per location at the onset of the research were 0, 30 and 60 % N. Initial soils and manures were analyzed for macro nutrients. ...
