AN EVALUATION OF VARIATION IN NATURAL DURABILITY OF CUPERSSUS SEMPERVIRENS IN NOWSHAR AT THREE HEIGHTS ABOVE SEA LEVEL

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TAZAKOR REZAEY V.; PARSAPAZHOUH D.; KHADEMI ESLAM H.A.

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Journal: IRANIAN JOURNAL OF NATURAL RESOURCES Year:2006 | Volume:59 | Issue:2 Page(s): 421-431

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Title

AN EVALUATION OF VARIATION IN NATURAL DURABILITY OF CUPERSSUS SEMPERVIRENS IN NOWSHAR AT THREE HEIGHTS ABOVE SEA LEVEL

Author(s)

TAZAKOR REZAEY V. | PARSAPAZHOUH D. | KHADEMI ESLAM H.A. | Issue Writer Certificate

Keywords

CUPRESSUS SEMPERVIRENSQ2

CORIOLUS VERSICOLORQ2

NATURAL DURABILITYQ2

COMPRESSIVE STRENGTH (PARALLEL TO GRAIN)Q4

HARDNESSQ3

WEIGHT REDUCTIONQ3

KOLLECHAL METHODQ3

Abstract

The present work is a study of the variation in NATURAL DURABILITY of CUPRESSUS SEMPERVIRENSe against white rot (Coriolus versicolor) at three heights from sea level. In the conditions mentioned, evaluation was made while using KOLLECHAL METHOD according to DIN 8216 and B. S, 838: 1961, in a completely randomized design. In addition to NATURAL DURABILITY, specimens were contaminated with cultured fungus for fourteen weeks (22°C and 75% relative humidity), after which, weight loss, comperessive strength (parallel to grain), and HARDNESS of specimens were assessed. Weight loss of specimens (from 40) and 500 meter heights above sea level was more and accompanied by less durability was a significant diffrence observed among heights above sea level, concerning weight loss. Compressive strength (parallel to grain) was related to height above sea level so that samples from the highest level had the highest strengths. There was a significant difference observed among HARDNESS of samples from the three different heights above sea level.

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