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    MEASUREMENT OF SMALLHOLDER TREE FARMS ON LEYTE ISLAND

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    This paper describes the field techniques used to measure timber volume and log quality (including straightness, forking, appearance of defects, and knots) of timber from smallholder tree farms on Leyte Island conducted as part of the ACIAR project ASEM/2003/052, Improving Financial Returns from Smallholder Tree Farms in the Philippines. Tree farms were included in the sample if they were 0.1 ha or greater and contained 100 trees or more. Often tree farms had several blocks of trees (e.g. different species or ages) and within each block two circular plots were established one in the centre and one on the edge. For each tree over 10 cm diameter at breast height (dbh) in the plot, measurements were made of dbh, diameter at the base (db), tree height, location, crown depth, crown radius, bearing and distance of each tree with reference to the plot centre. Estimates of log lengths and grade that each tree was expected to yield were also recorded, along with a sketch of each tree. In addition, data were collected on tree farm, block and plot characteristics, and then entered into an ACCESS database for subsequent analysis. These data are currently being analysed.

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    Description

    Title : MEASUREMENT OF SMALLHOLDER TREE FARMS ON LEYTE ISLAND
    Author(s) : Jose Glenn, Noel Monterola, Florante Morales, John Herbohn, Jerome Vanclay, Grant Wardell-johnson, Eduardo Mangaoang, Steve Harrison
    Abstract : This paper describes the field techniques used to measure timber volume and log quality (including straightness, forking, appearance of defects, and knots) of timber from smallholder tree farms on Leyte Island conducted as part of the ACIAR project ASEM/2003/052, Improving Financial Returns from Smallholder Tree Farms in the Philippines. Tree farms were included in the sample if they were 0.1 ha or greater and contained 100 trees or more. Often tree farms had several blocks of trees (e.g. different species or ages) and within each block two circular plots were established one in the centre and one on the edge. For each tree over 10 cm diameter at breast height (dbh) in the plot, measurements were made of dbh, diameter at the base (db), tree height, location, crown depth, crown radius, bearing and distance of each tree with reference to the plot centre. Estimates of log lengths and grade that each tree was expected to yield were also recorded, along with a sketch of each tree. In addition, data were collected on tree farm, block and plot characteristics, and then entered into an ACCESS database for subsequent analysis. These data are currently being analysed.
    Subject : unspecified
    Area : Other
    Language : English
    Year : 2007

    Affiliations Southern Cross University
    Editors : S Harrison, A Bosch, J Herbohn
    Journal : Improving the Triple Bottom Line Returns from Smallscale Forestr
    Pages : 283-296
    Url : http://espace.library.uq.edu.au/eserv.php?pid=UQ:108374&dsID=n31_Glen_SHORT_FINAL.pdf

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    Jerome's Peer Evaluation activity

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    • Habiba Hassan Wassef, Senior professional, Independent international expert, United Nations, WHO, National Coordinator for the 7th European Framework Research Programme, National Research Center in Cairo, Egypt.
    • Thuy Nguyen, Student, Ph.D. Level, Silviculture Research Institute, Ha Noi, Vietnam, The University of Melbourne.
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