|Better Farming Series 21. Wet Paddy or Swamp Rice (FAO, 1977, 40 p.)|
|How to get good yields|
9. The main irrigation channels take water to the whole of the field.
They follow the outside edges of the field.
The channels must be big enough to let the water flow through well.
If the field has no slope, the channels must be dug deeper near the second dam.