Abstract: By study of the root zone soil under the Corylus and non Corylus clusters we know that the pH value is higher, the contents of soil organic matter, total nitrogen, alkali-discomposed nitrogen and total phosphorus are higher, the content of the available phosphoru is lower and the soil granular structure and the durability of water are higher under the Corylus cluster.The results show that the Corylus cluster have an important function in ameliorating the physical and chemical properties of soil.

Key words: Corylus, Physical and chemical properties of soil