共 16 条
[1]
Bremner J.M., 1982, NITROGEN TOTAL, P595, DOI DOI 10.2134/AGRONMONOGR9.2.2ED
[2]
Cole C, 1987, SSSA SPEC PUB, V19
[3]
Cordell L. S., 1984, PREHISTORY SW
[4]
DREGNE HE, 1955, NEW MEXICO AGR EXP S, V396
[5]
JENNY J, 1950, HILGARDIA, V20, P1
[6]
JOHNSON CLARENCE M., 1959, BULL CALIFORNIA AGRIC EXPT STA, V766, P25
[7]
Minnis Paul E., 1985, SOCIAL ADAPTATION FO
[8]
Olsen S. R., 1982, Methods of soil analysis. Part 2. Chemical and microbiological properties, P403
[9]
Sandor J.A., 1983, THESIS U CALIFORNIA