共 14 条
[11]
MACKENZIE AJ, 1967, 2 SOIL SCI SOC AM SP, P25
[12]
RAY HE, 1962, SOIL PLANT ANALYSIS
[13]
ULRICH A, 1967, 2 SOIL SCI SOC AM SP, P11
[14]
Ulrich A., 1948, PLANT ANAL METHODS I, P157