Initial and Residual Effects of Rock Phosphate and Superphosphate
1960
Doll, E. C. | Miller, H. F. | Freeman, J. F.
SynopsisAfter 26 and 27 years at the Campbellsville and Greenville experiment fields, respectively, yields of corn, wheat, and hay were generally maintained or increased on superphosphate, rock phosphate, and rock phosphate residual plots, but decreased on superphosphate residual plots. Initial availability of rock phosphate tended to be lower than that of concentrated superphosphate.
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