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MD
MO
MT
NC
OH
SD
Shaanxi
Sichuan
SK
Tamil Nadu
TX
VA
WA
West Bengal
Xinjiang
XINJIANG-01
Potassium cycling in the wheat/corn soil/plant system
Yunnan
(Not Categorized)
1996
1995
1994
1993
1992
1991
1990
1989
1988
1986
1985
1984
