Credit: Lumbwe Kalumba (Zambia) Description: Lumbwe Kaluba and Abdel Rahman El Gamal
The photo shows a compost crib in the shallow corner of an earthen fish pond. The crib could be built with bamboo or wooden poles. It is recommended that for a 1000-m2 pond the radius of the crib should be about 1 m. The compost material is put inside the crib up to the water line and should be packed down well. In order to facilitate adequate aeration and hence aerobic conditions, the compost pile should be ‘turned over’ periodically. Also, in order to keep the desired plankton bloom in fish ponds, fresh batches of compost are added periodically.
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