共 31 条
[21]
SAMPLING SOIL AND FOLIAGE IN A PINE PLANTATION
[J].
SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS,
1966, 30 (03)
:397-&
[23]
NELSON L. A., 1962, SOIL SCI SOC AMER PROC, V26, P497
[24]
OLSON R. A., 1958, AGRON JOUR, V50, P185
[25]
PECK T. R., 1967, SSSA [SOIL SCI SOC AMER] SPEC PUBL SER, V2, P25
[26]
REED JF, 1947, J AM SOC AGRON, V39, P26
[27]
RIGNEY JA, 1956, AMER SOC HORT SCI, V68, P569
[28]
SHIUE CHERNG-JIANN, 1957, SOIL SCI, V84, P219, DOI 10.1097/00010694-195709000-00005
[29]
Snedecor G.W., 1980, STAT METHODS
[30]
WILDING L. P., 1964, SOIL SCI SOC AMER PROC, V28, P674