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Minimum distance boundary method: maximum size-density lines for unthinned Acacia mangiumplantations in South Sumatra, Indonesia

Authors :
Arisman, Hardjono
Kurinobu, Susumu
Hardiyanto, Eko
Source :
Journal of Forest Research; August 2004, Vol. 9 Issue: 3 p233-237, 5p
Publication Year :
2004

Abstract

AbstractA minimum-distance boundary method that will minimize the sum of distances between measured points and a fitted self-thinning lines on log-log coordinates of stand density and quadratic mean diameter was proposed in order to estimate the maximum size density line: an upper boundary of self-thinning line. The lines for A. mangiumwere inferred with this method using data in two areas of unthinned plantations in South Sumatra, Indonesia. Slopes of the lines were deduced as −1.63 and −1.67 within the range of 10–21 cm of quadratic mean dbh. The intensity of self-thinning was examined as a rate of reduction of density in relation to dbh increment. The rates were found to be higher than the slopes in the range close to the maximum line; hence the lines inferred in this study were likely existent. Maximum basal area deduced from the size-density line was 28–30 m2/ha at 12cm of dbh and then it increased up to 34–37 m2/ha at 20 cm of dbh.

Details

Language :
English
ISSN :
13416979 and 16107403
Volume :
9
Issue :
3
Database :
Supplemental Index
Journal :
Journal of Forest Research
Publication Type :
Periodical
Accession number :
ejs41400438
Full Text :
https://doi.org/10.1007/s10310-004-0080-4