A field experiment of three replications,four treatments and a series of check demonstrations conducted in 1988～1992.Those four treatments are “wheatwatermeloncottonradish”、“wheatwatermeloncornradish”、“wheatwatermelonpepperradish” and “wheatcotton(CK)”.The results indicate that the output value,the net income per Mu or per labor day,and the output/input radio of the three intercropping models were able to be increased by 3.26～5.20,4.37～8.24,2.11～3.69 and 0.75～1.28 times as compared with those of...