共 14 条
[3]
BREMNER J. M., 1958, JOUR AGRIC SCI, V51, P40
[4]
BREMNER JM, 1965, METHODS SOIL ANALY 2
[5]
CAMPBELL NER, 1968, SOIL BIOCHEMISTRY
[6]
GAYON V, 1886, MEM SOC SCI PHYS N 3, V2, P201
[7]
NELSON D W, 1970, Soil Biology and Biochemistry, V2, P1, DOI 10.1016/0038-0717(70)90019-2
[8]
NOMMIK H., 1956, Acta Agriculturae Scandinavica, V6, P195
[9]
REUSS J. O., 1965, SOIL SCI SOC AMER PROC, V29, P267
[10]
SIITAM PE, 1968, THESIS U GUELPH