Aimed to the problems of management careless, low yield and quality, product lacking of market competition ability and presenility pathogenesis of leaves of walnut, early bearing and pellicle walnut trees were used in this article to study the relationship of leaves and soil mineral elements contents and fruit yield, quality and presenility pathogenesis of walnut leaves were studied from 2004 to 2005 at Lvling fruit limited company of Hebei. The results were as follows.1. The annual changes rule of soil and...
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