Fig. 207. Breeding Ponds With Boarded Edges 

 Also showing one of the world's best-known and cheapest grass cutters— a useful 

 adjunct on a farm with acres of ponds. Some fish farms utilize sheep. 



Fig. 207a. Egg Nests 

 They have just been removed from upper pond and are being placed in raised 

 concrete hatchery tanks. Eggs are deposited on the grassy mat, which is supported 

 by poultry netting. Fish enter through open side spaces in the bottom. 



226 



