EFFECT OF DIFFERENT APPLYING METHODS ON IMPROVING ALKALINE SOILS WITH GYPSUM

The effect of different methods of applying gypsum on improving alkaline soils were studied. The resulted indicats:in three methods,mixing gypsum with 60cm depth soil is the best methods;mixing gypsum with 20cm depth soil is worse than above method and applying simply gypsum on the surface of soil is the worst. However,the second method is more practicall than others.