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果树因抚育管理不足及外界环境影响发生1年果多、翌年果少的现象,叫做果树大小年现象。这种现象继续到第3、4年,果园产量越来越低,引起亏本。一、土壤改良
Fruit trees due to lack of management and external environmental impact of more than 1 year fruit, fruit less the following year phenomenon, called the annual fruit size phenomenon. This phenomenon continues until the third and fourth years, the orchard yield is getting lower and lower, causing a loss. First, soil improvement