共 11 条
[2]
DEROO HC, 1957, 608 CONN AGR EXP STA
[3]
HALL NS, 1953, 101 N CAR AGR EXP ST
[4]
Jackson ML, 1958, SOIL CHEMICAL ANALYS
[5]
LIPPS R. C., 1957, SOIL SCI, V84, P195, DOI 10.1097/00010694-195709000-00002
[6]
MURDOCK JOHN T., 1958, SOIL SCI SOC AMER PROC, V22, P53
[7]
OLSEN S. R., 1961, SOIL SCI SOC AMER PROC, V25, P289
[8]
OSWALT D. L., 1959, SOIL SCI SOC AMER PROC, V23, P228
[10]
WEAVER JE, 1927, ROOT DEVELOPMENT VEG