USDA Bulletin 1074, published in 1922, was written by J.
Allen Clark and colleagues.
of American Wheat Varieties This is a very useful text describing the
varieties of wheat cultivated in North America in 1922. Variety descriptions, crop regions, history and nomenclature information
are also given. Before downloading please note that this bulletin is a book with 238 pages. Click on the link below to view
USDA Bulletin 1074.
Classification of American Wheat Varieties
USDA Bulletin 354 describes a wide range of seed cleaning equipment including the more usual Clipper style shaking sieves
and fan system, and gravity separators. There is also good general advice on handling seed, including grains, from field to
bagging and storage. Click on the link below to access USDA Bulletin 354.
USDA Bulletin 354 Grain cleaning & handling