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In areas known to be deficient in trace minerals, give f|*e access to 9 divided mineral box with trace mineralized salt on one side and bonemeal or jother suitable phosphate and 'ground limestone on the other side. Often it is * goal idea to mix a little salt with the bonemeal, or the limestonebonemeai mixture, merely to keep it from getting dusty and unpalatable. . ‘
Considering their ordinary' base feeds,, cattle need primarily phosphorous added to their" rations rather than lime or calcium , If intended for cattle, mineral mix-!1 tures, whether home-made dr comrryjtcial should as nearly as possible have the phosphorus as high as it is in steamed bonemeal (14 per cent) or .even higher,
To make sure of enough phosphorus for dairy cattle, add one per cent bonemeal or other suitable . phosphate along with one per cent salt to thle grain mixture. Other • ..ruminants, or dry cows that may not be getting grain, may be,given voluntary access to minerals^
To make jsure of enough calcium for swine, if fed all-plant rations with no animal protein, add 0.75 per cent ground limestone, or about one per cent of a mixture of limestone and bonemeal along with 0.5 per cent salt to the total ration. Merely ffee access to
exground Limestone has in some periments given good results.
When meat scraps or smilarj animal by-products make up the major proportion of the protein concentrates, no additional calcium or .phosphorus is necessary. , , !
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