“三套种”的好处;一是增产.洋葱套种花生,两者产量不受影响,在“芒种”左右套插上甘薯,且易成活全苗,比“立秋”左右插的花生薯,生长期延长两个月左右,变晚薯为早薯.一般亩产洋葱1000～1500公斤,花生100～150公斤,甘薯2000多公斤,可增产甘薯1000多公斤,二是增收.一般习惯花生前作为冬闲,而多种一季洋 “Three sets of” benefits; First, the yield. Onion interplant peanut, the yield is not affected, in the “mount” around the inserted sweet potato, and easy to survive the whole plant, than the “autumn” about inserted peanut potato, growth period Extension of two months or so, change the late potato for the early potato.General 1000-1,500 kg per mu of onions, peanuts 100-150 kg, sweet potato more than 2000 kilograms, can increase sweet potato more than 1000 kilograms, and second, income .General habit of peanut before winter , And a variety of seasons