山旱地缺肥少水，地力较差，所栽果树很易形成小老树，树势衰弱，产量低，品质差。因而预防小老树的出现是山旱地果树生产中的首要任务。根据我们对山旱地果树的管理经验，以下措施可有效地防止小老树的出现。1深翻改土在春夏秋三季均可进行深翻，但以秋季效果最好，对树势影响 Mountain drought lack of water and less fertility, the planting of fruit trees is very easy to form a small tree, shrubs weak, low yield, poor quality. Thus preventing the emergence of small trees is the most important task in the production of mountain dry fruit trees. Based on our management experience with mountain dry fruit trees, the following measures can effectively prevent the emergence of small old trees. 1 deep turning soil can be deep plowing in the spring, summer and autumn, but the best autumn effect on the tree potential