Animal nutrition / [Thomas Barlow Wood].

  • Thomas Barlow Wood
Date:
1924
Catalogue details

Licence: In copyright

Credit: Animal nutrition / [Thomas Barlow Wood]. Source: Wellcome Collection.

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    cake as above, 2/8§. Cost per lb. of stareh equivalent 2/8f -4- 22'4 = l‘46d. For many purposes this is a more useful figure. For instance, in rationing animals the daily require¬ ments were reckoned in lb. starch equivalent. The cost per lb. starch equivalent is therefore useful in assessing the cost of the daily ration. Thus, the ration per gallon of milk being 2^ lb. starch equivalent, if this can be bought at T46d. per lb., the cost of the ration will be 2| x T46d. or practically 3^ per gallon. This of course is the cost over maintenance. If the main¬ tenance ration is 61b. of starch equivalent, and the cow pro¬ duces 4 gallons of milk, in producing which she consumes 4 x 2J= 91b. starch equivalent, her total consumption will be 151b. starch equivalent. This will cost 15 X T46d. or 2T9d., which is 219 4 = 5J per gallon. The cost per unit and per lb. of starch equivalent of a number of common feeding stuffs at current prices are given each month in The Journal of the Ministry of Agriculture in “ Notes on Feeding Stuffs.” These notes provide a very useful guide as to the relative cost of starch equivalent in the common feeding stuffs. Cost, however, is by no means the only criterion of value. In buying feeding stuffs their suitability for Price not only the purpose for which they are required must Value. also be faken into account, and this suitability may be looked at from two points of view: composition and what may be called for want of a better word—wholesomeness. In order to decide if a feeding stuff is suitable from the point of view of composition it is necessary to Nutritive know first the composition of the deficit which Ratio. . r , _' , . it is required to make good. In choosing a feeding stuff to make good the deficit in protein of a ration of home grown roots and straw, evidently a feeding stuff rich in protein is required. Richness in protein is, however, not always measured by the percentage of protein in the
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