They may be chopped into small pieces and mixed together into a compost pile. A mixture of animal and green manures provides a good fertilizer. Compost should be kept moist, not saturated or dry, so it rots quickly. To control acidity 2.5 kg of finely ground lime may be mixed with 100 kg of compost material. Compost piles should be turned and mixed weekly to promote aeration and rapid decomposition.
Compost piles shrink as the material decomposes.
Compost is an effective fertilizer for small ponds. The size of pond that can be effectively fertilized depends upon the quantity of compost available. Place compost material into corrals built of bamboo or wood measuring at least two meters long by one meter wide. Pile cut weeds, grasses and other soft plants and scraps inside the frame. Stir the pile weekly to promote continued decomposition.