坡度大于2%时，灌水沟很难避免冲刷侵蚀。
Irrigation furrows with slope gradients steeper than 2% are difficult to irrigation without erosion.
对相似的土壤和坡度，畦田长度和灌水沟的长度雷同。
Their lengths are similar to the lengths of furrows on comparable soils and slope gradients.
灌水沟的长度受到在灌水时间内灌溉水流动距离的限制。
The length of irrigation furrows is limited by the distance irrigation streams will flow during an irrigation period.
把水放入几块畦田比放人许多灌水沟或垄沟花费的劳力要少，这就补偿了平整土地的费用。
The cost of land leveling is offset by the low labor requirement for turning water into a few border rather than into many furrows or corrugations.
把水放入几块畦田比放人许多灌水沟或垄沟花费的劳力要少，这就补偿了平整土地的费用。
The cost of land leveling is offset by the low labor requirement for turning water into a few border rather than into many furrows or corrugations.
应用推荐