Study on the Integrated Cultural Practices to Promote the High Yield of Mature Trees of Walnut

Two experiments were carried out,from 1987-1990 in two Walnut orchards in Beijing and Shanxi,China,to study the effects of the integrated cultural practices to promote the high yield of mature trees of Walnut.The results showed that the integrated cultural practices not only raised the tree growth and the nut yield,but also increased the content of organic matter and improved the fertility of soil.The numbers of cultural practices integrated were positively related to the increasing scope of nut yield in some extent.The best consolidated treatments were found in two sites.The application of the cultural practices to Walnut production was also discussed.