Many co-op farms, including those in Sadong and Samsok Districts of Pyongyang and Taedong County of South Phyongan Province, have benefited from fish breeding in paddy fields -- increasing the yield of rice and supplying fishes to peasants without consumption of labor, fertilizers and agrochemicals.

Cooperative farms in Samsok District have put hundreds of thousands of fries in many rice fields this year, too, making good conditions for fish breeding.

Those in Taedong County have made levees of fish breeding paddy fields higher than others, providing peasants with scientific and technical information of fish breeding in rice fields.

The Kupho Cooperative Farm in Hwangju County, North Hwanghae Province has chosen rice fields favorable for irrigation and drainage and safe from flood and installed nets in their irrigation gates to prevent fries from slipping away.