共 31 条
[4]
ALEXANDER M, 1961, INTRO SOIL MICROBIOL
[5]
[Anonymous], AGRONOMY
[6]
BLANCHAR R. W., 1965, SOIL SCI SOC AMER PROC, V29, P71
[8]
BREMNER JM, 1960, J AGR SCI, V5, P1
[9]
DELWICHE CC, 1967, SOIL BIOCHEMISTRY