j w t duvel

J. W. T. Duvel · U.S. Dept. of Agriculture

56 sayfa · 1927

Wheat trade / Agriculture / Forecasting

J. W. T. Duvel · Govt. print. off.

16 sayfa · 1906

Garlic / Garlic in Wheat

J. W. T. Duvel · U.S. Dept. of Agriculture, Bureau of Plant Industry

12 sayfa · 1909

Corn / Storage

J. W. T. Duvel · U.S. Dept. of Agriculture, Bureau of Plant Industry

11 sayfa · 1911

Corn / Storage

J. W. T. Duvel · U.S. Dept. of Agriculture, Bureau of Plant Industry

13 sayfa · 1909

Grain / Moisture / Weights and measures

J. W. T. Duvel · U.S. Dept. of Agriculture, Bureau of Plant Industry

15 sayfa · 1910

Moisture meters / Grain / Moisture

J. W. T. Duvel · U.S. Dept. of Agriculture

21 sayfa · 1913

Corn / Transportation / Diseases and injuries

J. W. T. Duvel · U.S. Dept. of Agriculture

11 sayfa · 1915

Corn / Grading

J. W. T. Duvel · U.S. Department of Agriculture

52 sayfa · 1928

Marketing / Wheat

J. W. T. Duvel · U.S. Dept. of Agriculture

16 sayfa · 1906

Corn / Seeds

J. W. T. Duvel · University of Michigan-Ann Arbor

96 sayfa · 1902

Vitality / Plants / Germination

J. W. T. Duvel · Govt. print. off.

16 sayfa · 1905

Wild rice