It was found that nematode-trapping fungal isolates were able to parasitize soil-borne plant pathogens by spring-like coiling ring, appressorium-like structure, simple hyphal-coil or sticky growth in dual cultures.

This paper the expounds the sterilization of shed room soil, seedb ed soil and part soil, introduces preventive measures for the soil diseases of veg etables from the farming technique aspects of the crop rotation, soil displacing and grafting, etc.

This paper reports our strdy on the disease-suppressive mechanism of the bacterial wilt disease-suppressive soils, which is called white-mud soil of tomato in Yichun.

Organo-mineral complexes were separated from different developing direction and phases of steppe soils with fractional method of particle-size and density, and their mounts, humus contents, composition and ratio of carbon to nitrogen were analyzed.

Five different land utilization methods of saline steppe soil in the west of Jilin province were selected,including grazing grassland,fencing grassland,tillable,new paddy field and long-term cultivate paddy field.