Data does not contain special practices. There is one zip file for each crop.
Barley
1919-1923
1924-1928
1929-1934
1935-1939
1940-1944
1945-1949
1950-1954
1955-1959
1960-1964
1965-1969
1970-1974
1975-1979
1980-1984
1985-1989
1990-1994
1995-1999
Corn for Grain
1910-1914
1915-1919
1920-1924
1925-1929
1930-1934
1980-1985
1986-1990
1991-1995
1996-1999
Upland Cotton
American Pima Cotton
