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Electronic Theses & Dissertations
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Crop yields
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Crops--Composition
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Phosphate rock
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Miller Robert L
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Differential effects of phosphorus and potassium fertility on nutrient uptake and yield of soybean varieties (Glycine max L. Merrill)
Kalnbach, Robert Charles
Text (1977)
Part of
Electronic Theses & Dissertations
The effectiveness of rock phosphate and superphosphate on yield and composition of crops
Guttay, John Robert, 1924-
Text (1959)
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Electronic Theses & Dissertations
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