|Better Farming Series 21. Wet Paddy or Swamp Rice (FAO, 1977,
40 p.)| |How to get good yields| 7. Dams are small barriers
across the stream. Dams hold up the water, so that the water of
the stream rises. In this way, the water of the stream overflows
into the low- lying land. It is best to have concrete dams. They
cost more, but they last longer. The good harvests of the
following years will pay for the dams. The technician will tell
you where to build your dams. 8. When the dam is built, dig
irrigation channels around the edges of the field. These are
called main Irrigation channels. Dig also, right through the
middle of the field, the main drain. The water flow starts from
the dam. It goes into the main irrigation channels. It floods
the rice field. It goes out of the rice field into the main
drain, which is the channel for the outflow of the water.