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r a jehle
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Diseases of field and vegetable crops in the United States in 1925
R. A. Jehle · Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture
152 sayfa · 1926
Field crops / Vegetables / Diseases and pests
Dusting and spraying cantaloupes
R. A. Jehle, S. F. Potts · University of Maryland, Agricultural Experiment Station
180 sayfa · 1924
Muskmelon / Diseases and pests / Control / Spraying and dusting in agriculture