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Abstract
1. De‐oiled mango seed kernel meal (MSK) was found to contain tannins, cyanogenetic glucosides and traces of alkaloids and gums. Treating with 0#lb3 m HCl followed by Ca(OH)2 suspension removed all of the tannins and much of the cyanogenetic glucosides and gums.
2. Substitution of 141 g MSK/kg diet for maize in a practical diet did not affect performance of chicks, whereas adverse effects occurred with 282 g or more/kg.
3. Processing of MSK improved performance but it was still not equivalent to that achieved with maize.
4. Increasing the protein content of the diet containing processed MSK from 207 to 226 g/kg did not improve performance and replacing ground nut meal with soyabean meal depressed performance.