共 5 条
[1]
LEA R, 1980, 9 N CAR STAT U FOR F
[2]
MAHENDRAPPA M K, 1973, Canadian Journal of Forest Research, V3, P333, DOI 10.1139/x73-048
[3]
ANALYSIS OF NEEDLE FALL AS A MEANS OF ASSESSING NITROGEN STATUS IN PINE
[J].
FORESTRY,
1976, 49 (01)
:57-61
[5]
SMALLEY GW, 1968, SO32 US FOR SERV RES