Comparison of point-3P and modified point-list sampling for inventory of mature native hardwood forest in southeastern New South Wales
1992
Wood, G.B. | Wiant, H.V. Jr
A modified form of point-list sampling is described for a forest inventory; apart from a preliminary reconnaissance survey, this sampling method requires a single visit to the field and ensures that the desired size of the second-stage sample is obtained. Results achieved in applying the method for inventory of 68 ha of mature hardwood forest in southeastern New South Wales are compared with those derived from a conventional point-3P (also known as point-Poisson) inventory of the area using an identical first-stage sample design. The total volume estimates for the two inventories were comparable. The precision of the point-3P inventory was slightly better (8.7% SE compared with 9.0%) but the cost was greater because 9 more than the desired number of trees (38) were selected in the second-stage sample. The advantages of modified point-list sampling are discussed and estimation formulae are presented.
Показать больше [+] Меньше [-]Ключевые слова АГРОВОК
Библиографическая информация
Эту запись предоставил National Agricultural Library
