royal j haskell

Royal J. Haskell · [U.S. Department of Agriculture]

Sayfa sayısı yok · 1931

Agricultural pests / Radio scripts / Economic aspects / National farm and home hour (Radio program)

Royal J. Haskell · U.S. Dept. of Agriculture

Sayfa sayısı yok · 1943

Vegetable gardening / Vegetables / Disease and pest resistance / Diseases and pests

Royal J. Haskell · [U.S. Department of Agriculture]

Sayfa sayısı yok · 1935

Grain / Seeds / Diseases and pests / Control / Radio addresses, debates

Royal J. Haskell · Yayınevi bilinmiyor

Sayfa sayısı yok · 1933

Radio scripts / National farm and home hour (Radio program) / Economic aspects / Plant diseases

Royal J. Haskell · Plant Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

159 sayfa · 1919

Forage plants / Grain / Diseases and pests

Royal J. Haskell · Office of Plant Disease Survey and Pathological Collections, Bureau of Plant Industry, United States Department of Agriculture

191 sayfa · 1925

Forage plants / Grain / Diseases and pests

Royal J. Haskell · Plant Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

273 sayfa · 1920

Field crops / Vegetables / Diseases and pests

Royal J. Haskell · Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

333 sayfa · 1927

Field crops / Vegetables / Diseases and pests

Royal J. Haskell · Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

78 sayfa · 1930

Plant diseases

Royal J. Haskell · Division of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

28 sayfa · 1931

Tobacco / Diseases and pests

Royal J. Haskell · Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

323 sayfa · 1929

Forage plants / Grain / Diseases and pests

Royal J. Haskell · Plant Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

138 sayfa · 1922

Fruit / Nuts / Diseases and pests

Royal J. Haskell · Office of Plant Disease Survey and Pathological Collections, Bureau of Plant Industry, United States Department of Agriculture

312 sayfa · 1925

Field crops / Vegetables / Diseases and pests

Royal J. Haskell · Plant Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

317 sayfa · 1924

Forage plants / Grain / Diseases and pests

Royal J. Haskell · Division of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

Sayfa sayısı yok · 1931

Wheat / Smut diseases / Diseases and pests

Royal J. Haskell · Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

353 sayfa · 1928

Forage plants / Grain / Diseases and pests

Royal J. Haskell · Plant Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

287 sayfa · 1921

Field crops / Vegetables / Diseases and pests

Royal J. Haskell · Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

139 sayfa · 1930

Wheat / Smut diseases / Diseases and pests

Royal J. Haskell · Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

258 sayfa · 1929

Citrus / Tropical fruit / Fruit / Nuts / Diseases and pests

Royal J. Haskell · Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

381 sayfa · 1926

Forage plants / Grain / Diseases and pests

Royal J. Haskell · Plant Disease Survey, Bureau of Plant Industry, United States Department of Agriculture

266 sayfa · 1923

Forage plants / Grain / Diseases and pests