共 15 条
[2]
BEAR, 1948, SOIL SCI, V65, P67
[4]
CHU TS, 1949, MICH AGR EXP STA TEC, V214
[5]
GIDDENS J, 1950, THESIS RUTGERS U NEW
[7]
MARSHALL CE, 1944, 1943 SOIL SCI SOC AM, V8, P175
[8]
MARSHALL CE, 1944, MO AGR EXP STA RES B, V385
[9]
MCLEAN EO, 1949, 1948 SOIL SCI SOC AM, V13, P179