适地适树是造林工作必须遵循的主要原则。然而在多林的山区则往往被忽视,认为山区立地条件好、土壤和气侯均适合很多树木生长,不必强调适地适树。铜古是个多林山区县。近十多年来,全县小片皆伐迹地和荒山造林,保存面积约15万亩,其中一类林占50%左右,二类林占40%,三类林占10%左右。为什么会有10%的三类林呢?主要原因是有些地方没有做到适地适树。例为我县古桥公 Appropriate tree planting afforestation work must follow the main principles. However, mountainous areas in Duolin are often overlooked. They consider that mountainous areas have good conditions and that both the soil and the climate are suitable for the growth of many trees. Copper ancient is a multi-mountain county. In the past ten years or so, all small-scale deforestation and barren hills have been afforestated in the whole county. The area for preservation is about 150,000 mu, of which, the first category occupies about 50%, the second category accounts for 40% and the third category accounts for about 10%. Why there are 10% of the three types of forests? The main reason is that some places did not properly fit the tree. Example for my county ancient bridge