In 1961 to 1962, Borlaug's dwarf springs wheat strains were sent for multilocation testing in the International Wheat Rust Nursery, organized by the U.S. Department of Agriculture.
In 1965, after extensive testing, Borlaug's team, under Anderson, began its effort by importing about 450 tons of Lerma Rojo and Sonora 64 semi-dwarf seed varieties: 250 tons went to Pakistan and 200 to India.