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Fertilizer Recommendations for the Rolling Plains.
(Texas Agricultural Extension Service, 1956)
Fertilizer Recommendations for the Lower Rio Grande Valley.
(Texas Agricultural Extension Service, 1956)
Fertilizer Recommendations for the High Plains.
(Texas Agricultural Extension Service, 1956)
Fertilizer Recommendations for the Upper Rio Grande, and Trans Pecos.
(Texas Agricultural Extension Service, 1956)
Fertilizer Recommendations for the Rio Grande Plain.
(Texas Agricultural Extension Service, 1956)