共 10 条
[2]
ALLEN SE, 1968, CROPS SOILS, V21, P13
[3]
BREMMER JM, 1965, METHODS SOIL ANAL 2, P1164
[5]
ENGELSTAD O. P., 1964, AGRON J, V56, P579
[6]
MAYS D. A., 1969, Sulphur Institute Journal, V5, P7
[8]
MAYS DA, 1970, 11 P INT GRASSL C, P428
[10]
TERMAN GL, 1966, T664SF TVA REP