Asian Journal of Biological Sciences1996-3351xxxx-xxxxScience International10.3923/ajbs.2008.39.44Cupressus sempervirence var. horzontalis) in North of Iran]]>AhmadiArdalan FallahAsghar JalilvandHamid KoochYahya 1200811In order to determine the best form factor formula for
Zarbin (Cupressus sempervirence var. horzontalis) in Kordkoy region
(Golestan province-North of Iran), a number 54 trees were selected based
on their distribution in diameter classes, from 8 to 28 cm (in a 2 cm
diameter interval). First, several quantitative factors including diameter
at breast height, diameter at 0.65 m of height and diameter at stump were
measured using diameter tape, just before the trees being felled. After
cutting the trees, the heights and diameter from breast height up to the
height where diameter is 5 cm was measured using a diameter tape in a
two meter interval. Finally, diameter at 0.1, 0.3, 0.5, 0.7 and 0.9 m
of the total height was measured, respectively. As a consequent, each
trees volume was precisely calculated as the real volume. Next, the real
form factor (f_{r}) was calculated and its average was statistically
compared to the averages of natural (f_{0.1}), artificial (f_{0.5})
and hohenadel^{,} s (f_{h}) form factors using pair sample
t-test. Results showed that there is no significant difference between
the averages of Real and Natural from factors (at = 0.05 level). Hence,
just Natural form factor is capable to replace the real form factor of
Zarbin over the study area.]]>Anonymous,2003Bakhshi, A. and D. Parsa Pajoh,2007Bonyad, A. and T. Rostami Shahraji,2005Pinus elliottii) as a short rotation forestry in the North of Iran.]]>Dudzinska, M.,2003Fadaei, F.,2005Haghverdi, K.,2002Hejazi, R.,1964Husch, B., T. Beers and J. Kershaw,2003Khoshnava, M.,2006Lnoue, A.,2006Lotfalian, M., Z. Nouri, Y. Kooch and M. Zobeiry,2007Mahinipour, M.,2002Mexner, J.,2000Namiranian, M.,2007Rahim, N.S.,2008Pinus teada in Lakan region (Guilan Province- North of Iran).]]>Rezayee, A.,1993Rezayee, A. and A. Meibodi,2006Scocha, J. and M. Kulej,2005Socha, J.,2002Picea abies L. Karst.).]]>Socha, J. and M. Kulej,2007Abies grandis stem form factor under mountain conditions of Beskid Sadecki (Southern Poland).]]>Woodall, C.W., C.E. Fliedler and K.S. Milner,2003Zeide, B.,2005Zobeiry, M.,2000Zobeiry, M.,2002Zobeiry, M. and G.H. Najarian,2002