共 32 条
[1]
ASHBY WC, 1968, J FOREST, V66, P67
[2]
BOLLEN WB, 1968, BIOL ALDER, P141
[3]
BOLLEN WB, 1967, OREGON STATE U FORES, V12
[5]
BURKE RD, 1973, BLACK WALNUT CROP, P36
[6]
CARLSON PJ, 1984, 841 U ILL AGR EXP ST
[7]
NITROGEN-FIXATION IN RELATION TO PHOTOSYNTHESIS IN ALNUS-GLUTINOSA
[J].
BOTANICAL GAZETTE,
1979, 140
:S70-S75
[8]
NUTRIENT CONCENTRATIONS IN NATURALLY REGENERATED SEEDLINGS OF PICEA-SITCHENSIS IN SOUTHEAST ALASKA
[J].
FORESTRY,
1977, 50 (02)
:103-112
[9]
Finn R. F., 1953, Journal of Forestry, V51, P31