共 32 条
[1]
AUCHMOODY LR, 1975, NE331 US FOR SERV RE
[2]
INFLUENCE OF SPECIES, SEASON, AND SOIL ON FOLIAR MACRONUTRIENTS IN THE GREAT DISMAL SWAMP
[J].
BULLETIN OF THE TORREY BOTANICAL CLUB,
1985, 112 (02)
:146-157
[3]
Black C.A., 1965, METHODS SOIL ANAL, V1st, P1149, DOI DOI 10.2134/AGRONMONOGR9.2.C32
[4]
CHANDLER RF, 1939, 228 CORN U AGR EXP S
[6]
ELLIS R C, 1975, Canadian Journal of Forest Research, V5, P310, DOI 10.1139/x75-042
[7]
Freese F, 1967, AGR HDB, V317
[8]
GUHA M. M., 1965, Plant and Soil, V23, P323, DOI 10.1007/BF01347727
[10]
Helwig J.T., 1979, SAS USERS GUIDE