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Evaluation of zinc status of several Ecuadorian soils

Evaluation of zinc status of several Ecuadorian soils

Torres, Fernando Pacifico

Text (1974)

Part of Electronic Theses & Dissertations

The effects of copper applied to organic soil alone and in association with manganese and zinc, on composition of crops and reactions in the soil

The effects of copper applied to organic soil alone and in association with manganese and zinc, on composition of crops and reactions in the soil

Lucas, Robert E. (Robert Elmer), 1916-

Text (1947)

Part of Electronic Theses & Dissertations