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addition of lime alkalinity Ammonia Ammonium sulphate amount of dissolved Anzara ponds applied areas artificial food bacteria Bangi Bangi ponds barrage ponds basic slag bilharzia BONT bottom Calcium Calcium carbonate carbonate Clarias cotton-seed oil-cake DEMOLL denitrification Diko dissolved oxygen diversion ponds dykes EDMINSTER Equatoria fish ponds Ezzo feeding fish culture Fish farming floating and submerged former Belgian Congo herbivorous fish herbivorous Tilapia HUET Kainit kg/acre/ann Khors kilner jars KRUGEL and HEINRICH LANTSCH manioc MATIDA mill sweepings mode of application molluscs MORTIMER NAKAMURA Nasikisa nitrate Nitrogenous fertilizers NUTRITIVE QUOTIENT order to increase organic manures phosphate fertilizers phosphorus phytophagous phytoplankton plankton algae pond muds pond water ponds All ponds ponds are known ponds in Equatoria potassium quantities recommended samples Sangba showed snails and mosquitos sodium Sodium nitrate submerged vegetation Sudan suitable for fish sulphur superphosphate SWINGLE temperature Tombra pond water and mud water flow western Equatoria Province WUNDER Yambio