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Effectiveness of phosphate rocks in Colombian soils as measured by crop response and soil phosphorus levels

Effectiveness of phosphate rocks in Colombian soils as measured by crop response and soil phosphorus levels

Hammond, Lawrence Leroy, 1945-

Text (1977)

Part of Electronic Theses & Dissertations

The behavior of applied phosphorus and potassium in organic soil as indicated by soil tests and the relationship between soil tests, green-tissue tests and crop yields

The behavior of applied phosphorus and potassium in organic soil as indicated by soil tests and the relationship between soil tests, green-tissue tests and crop yields

Bigger, Theodore Cuyler

Text (1953)

Part of Electronic Theses & Dissertations