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Soil Nutrient
Alfalfa
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Rhode Island
South Carolina
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Texas
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Vermont
Virginia
Washington
West Virginia
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Mapped Soil Series
Years
From
1949
1950
1951
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1967
1968
1971
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
to
1949
1950
1951
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1967
1968
1971
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
Soil Sample Depths (in.)
Soil Test Method
Run Correlation
County
Soil Fertility Trial County
Selected County
44
States
351
Counties
3363
Trials
Soil Series Description
Soil Test Correlation
0%