共 17 条
[2]
BARTON CJ, 1948, ANAL CHEM, V20, P1028
[3]
BOWER CA, 1949, 362 IOW AGR EXP STA, P961
[4]
DORMAAR J. F., 1964, CAN J SOIL SCI, V44, P265
[5]
DORMAAR J. F., 1963, CANADIAN JOUR SOIL SCI, V43, P35
[8]
MEHTA N. C., 1954, SOIL SCI SOC AMER PROC, V18, P443
[9]
PEARSON RW, 1940, SOIL SCI SOC AM P, V4, P162
[10]
PETERSON HB, 1941, 121 NEBR AGR EXP STA