存在自然障碍与人为破坏是中低产田低产的主要原因。
Both natural and artificial factors contribute to low and middle yield lands.
由此表明，中低产田深度开发具有良好的经济效益和生态效益。
Thus it proved that deeply-exploitation of middle - and low-yield field possessed better economic and ecological profit.
冷浸田是因长期浸水、土层糊烂与还原作用强烈而造成的一种低产田。
Cold spring paddy soils are the low yielded soils with puddling soil layer formed under strongly reducing condition induced by persistent submergence.
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