POULTRY FEEDS AND FEEDING 



stone grit contains about 30 per cent calcium, 6.5 per cent 

 magnesium and 3.3 per cent iron. 



Bone meal and ground rock phosphate which are on the 

 market in very fine and also in coarser forms are used in 

 the poultry mash to furnish mineral matter and afford the 

 cheapest and best sources for material of this kind. Bone 

 meal contains about 21 per cent of calcium, 10 per cent 

 of phosphorus, 0.5 per cent of sodium, 0.5 per cent of 

 magnesium and a little potassium, sulphur and iron. Most 

 of the meat scraps contain a considerable amount of bone 

 which is indicated in their analyses by the mineral or ash 

 content. Wheat middlings, bran, milk and green feeds all 

 supply considerable mineral matter to fowls, 



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