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A Revision of the North American Aphids of the Genus Myzus
A systematic study of the North American species of the aphid genus Myzus Passerini is presented in this publication. It brings together the known species, listing their hosts and giving their distributions, the locations of their types, and descriptions, drawings, and keys for their separation.
Directory of U.S. Register of Merit Sires and Dams Qualifying Under the National Poultry Improvement Plan, 1942-43
This publication provides some information of a nation-wide survey to determine the importance of butter as a source of vitamin A in the diet of the people of the United States.
Milk-quality Improvement Program for 4-H Dairy Clubs
The milk-quality improvement program outlined in this publication is designed to acquaint members of 4-H dairy clubs and other junior clubs with the importance of quality in milk, both from the economic standpoint of the producer and from the health standpoint of the consumer, and to teach these young people the essentials in the production of high-quality milk.
List of Sires Proved in Dairy Herd Improvement Associations, 1943
This summary, together with the one on farm crops, by the use of maps and supplementary charts, portrays the quantitative and geographic significance of production of the Nation's food supply.
