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Subject: Phosphate rock
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Subject: Phosphatic fertilizers
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Electronic Theses & Dissertations
2
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Theses
2
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English
2
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In Copyright
2
Subject
Corn
1
Crop yields
1
Crops--Composition
1
Phosphatic fertilizers
2
Plants--Effect of phosphorus on
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Superphosphates
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Influence of rock phosphate on available phosphorus as measured by plant uptake and soil extractants
Espinosa, José
Text (1979)
Part of
Electronic Theses & Dissertations
The effectiveness of rock phosphate and superphosphate on yield and composition of crops
Guttay, John Robert, 1924-
Text (1959)
Part of
Electronic Theses & Dissertations
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