Discover Our Collections
Limit your search
Tag- Digital item (1)
- 1964-10-xx (1)
- Estes, Billie Sol. (1)
- Investigations (1)
- Text (1)
- Folder (1)
1 results
- other parts of the United States. Only about 10 percent of farms in the United States are irrigated; in parts of west Texas, the percentage of irrigated farms is over 90 percent. Insecticides and fertilizer are used heavily on the irrigated land; annual