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Electronic Theses & Dissertations
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Potassium release characteristics of selected Peruvian soils
Oelsligle, Donald Daniel, 1943-
Text (1972)
Part of
Electronic Theses & Dissertations
Effect of rate, placement and source of potassium on yield and mineral content of potatoes and phosphorus forms and equilibria in selected Peruvian soils
Valverde, Carlos Suarez
Text (1970)
Part of
Electronic Theses & Dissertations
Genesis morphology and classification of Michigan alfisols and Peruvian entisols
Zavaleta, Amaro
Text (1967)
Part of
Electronic Theses & Dissertations
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