How Uniformity of Tree Distribution Affects Stand Growth
Author(s) -
W. M. Stiell
Publication year - 1978
Publication title -
the forestry chronicle
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 49
eISSN - 1499-9315
pISSN - 0015-7546
DOI - 10.5558/tfc54156-3
Subject(s) - hectare , basal area , pinus <genus> , tree (set theory) , red pine , forestry , horticulture , mathematics , thinning , significant difference , volume (thermodynamics) , botany , biology , geography , physics , ecology , statistics , combinatorics , agriculture , quantum mechanics
Part of a 13-year-old plantation of red pine (Pinus resinosa Ait.) was thinned to leave stems uniformly distributed throughout the stand, and another part was thinned to leave the same number of stems but in equally spaced 4-tree clumps. After 10 years the clumped trees had smaller live crowns (owing to more intense shade on the inside of the clumps), reflected in lower growth in d.b.h. and basal area per hectare, and higher form class. No significant difference between treatments was found in volume per hectare, but it was concluded that 5-tree or larger clumps would result in reduced wood production.
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