questions: asking about fish cum duck farming in pond 
 answers: duck droppings and the left over feed of each duck can increase the output of fish to 37.5 kg/ha. ducks keep aquatic plants in check. no additional land is required for duckery activities. it results in high production of fish, duck eggs and duck meat in unit time and water area. it ensures high profit through less investment. 200 – 300 ducks are sufficient to produce manure adequate enough to fertilize a hectare of water area under fish culture. 2 - 4 months old ducklings are kept on the pond after providing them necessary prophylactic medicines as a safeguard against epidemics.