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Zinc Deficiency and Fertilization.
(Texas Agricultural Extension Service, 1980)
Field and Forage Crop Fertilization in the Lower Rio Grande Valley.
(Texas Agricultural Extension Service, 1978)
Field and Forage Crop Fertilization in the Lower Rio Grande Valley.
(Texas Agricultural Extension Service, 1976)
Field and Forage Crop Fertilization in the Rio Grande Plains.
(Texas Agricultural Extension Service, 1976)