一、抽样总体的确定:伐区调查与其它森林资源调查相比,要求资源落实到较小地段的伐块上(林业局一般要求为10公顷左右)。而在伐块内部与相邻伐块之间,一般林分较为整齐,林木蓄积变动较小。上述两个特点给抽样调查在伐区调查上的应用既创造了有利的条件,同时也带来了不利的因素。有利的 First, determine the overall sampling: cutting area survey and other forest resources survey compared to require resources to implement a smaller section of the cutting block (Forestry Bureau generally required about 10 hectares). However, between the interior of the cutting block and the adjacent cutting blocks, the general stand is more tidy and the change of the forest inventory is smaller. The above two features have created favorable conditions for the application of sampling surveys in the investigation of cutting areas as well as brought unfavorable factors. advantageous