细化搜索
结果 1-7 的 7
The financial stimulus in city milk production
1913
Harding, H. A. (Harry Alexis) | Brew, James D. (James Duncan)
The value of soybean and alfalfa hay in milk production
1913
Caldwell, R. E. (Ralph Elmer)
USDA Division of Agricultural Engineering records, 1913-1981, bulk 1919-1940 | USDA Division of Agricultural Engineering records | United States Department of Agriculture Division of Agricultural Engineering
1913-1981
The USDA Division of Agricultural Engineering Records contain photographs, glass negatives, and acetate negatives of images relating to agricultural engineering. Some of the subjects include irrigation, drainage, farm buildings, farm power and machinery, crops and crop conditioning, harvesting, care and handling of products, road construction, and farm electrification. Additionally, there are articles on agricultural engineering and farm electrification. The collection also contains speeches and papers by Arthur William Turner, who was assistant chief of the Bureau of Plant Industry, Soils, and Agricultural Engineering in 1943. Also, there are materials collected by M. Conner Ahrens, assistant chief of the Farm Electrification Research Branch of the U.S. Department of Agriculture (USDA) for a proposed book on the history of farm electrification.
显示更多 [+] 显示较少 [-]Economic factors in cattle feeding
1913
Mumford, Herbert W. (Herbert Windsor) | Hall, Louis D. (Louis Dixon)
Bee Keeping Extension Service publications, 1913-1942 | Beekeeping Extension Service publications
1913-1942
This collection contains pamphlets, publications, and printed materials relating to the practice of beekeeping. The topics include managing bees, control of bee diseases and pests, and the preparation of honey for sale.
显示更多 [+] 显示较少 [-]Veterinary Medicine Extension Service publications, 1913-1942
1913-1942
This collection contains pamphlets, publications, and printed materials, relating to veterinary medicine. The topics include hog cholera, foot-and-mouth disease, and hog mange.
显示更多 [+] 显示较少 [-]Iowa Farm Bureau Federation and Extension Service forms and publications, 1913-1945
1913-1945
This collection contains manuals and forms to record monthly reports, vouchers, neighborhood roll calls, and field reports.
显示更多 [+] 显示较少 [-]