西瓜茬种什么最好农作物轮作换茬十分重要，如果同一块地长期种植一种作物，会使土壤肥力减退，造成土壤中的水、肥、气、热不协调，同时前茬作物遗留在土壤中的病菌还会感染后茬的同一品种作物，一般要减产４０％—６０％以上．西瓜茬口后茬种什么最好呢？实践证明，最好... Watermelon stubble What is the best Crop rotation Cropping is very important, if the same piece of long-term cultivation of a crop, will make soil fertility decline, resulting in soil water, fertilizer, gas, heat is not coordinated, while the former crop left in the soil The bacteria in the stubble infected with the same variety of crops, generally to cut 40% -60% or more. Watermelon stubble after crop what kind of best? Practice has proved that the best ...