苏联东南农业科学研究所为了解生长在一簇内树种个体间的相互关系,对簇播、穴播和按簇、穴植树造林的林分的生长发育进行了观察,观察证明,橡树及其它乔木树种的生长与每簇或每穴内树种个体的数量有直接的关系。研究所总共在65条林带上测量了9160株橡树。调查和测量工作每年都进行,具体方法如下,在每1公 In order to understand the interrelationship among the individual species that grow in a cluster, the Institute of Southeast Agricultural Science of the Soviet Union observed the growth and development of the seed-planting, hole-sowing and tree-planting-tree planting. The results showed that oak and other tree species The growth is directly related to the number of individuals in each cluster or per hole. The Institute measured a total of 9160 oak trees on 65 forest belts. Survey and measurement work is conducted annually, the specific method is as follows, in every 1 public