Provider: Ingenta Connect
Database: Ingenta Connect
Content: application/x-research-info-systems
TY - ABST
AU - Alder, Denis
TI - A Distance-Independent Tree Model for Exotic Conifer Plantations in East Africa
JO - Forest Science
PY - 1979-03-01T00:00:00///
VL - 25
IS - 1
SP - 59
EP - 71
KW - maximum basal area
KW - dominance
KW - Diameter distribution
N2 - A simulation model of diameter increment and thinning for Cupressus lusitanica, Pinus patula, and Pinus radiata growing in Kenya, Tanzania, Uganda, and Malawi is presented. The diameter distribution is defined by a vector of diameters corresponding to fixed cumulative probability points. Increment of the diameter vector is a function of basal area relative to maximum basal area, diameter relative to dominant diameter, and height as a site-dependent index of age. A general algorithm for simulating thinning of the cumulative distribution is developed based upon the probability that a given stem will remain after thinning. Validation studies using permanent sample plot data for the 3 species show a standard deviation of percentage residuals for total volume prediction of 12-19 percent; they also show, through simulation of spacing experiments, that the model is accurate over a range of initial stockings from 120 to 1,400 stems/hectare. Forest Sci. 25:59-71.
UR - http://www.ingentaconnect.com/content/saf/fs/1979/00000025/00000001/art00011
ER -