76 



CANADIAN FARM YEAR BOOK. 



proceed down the fir&t column and, 

 finding the feeds there similar to 

 those possessed by you, figure out 

 your balanced ration, not forgetting 

 that variety is one of th« greatest ap- 

 petizers and aids to digestion in the 

 business. 



Wolff's Standards. 



The feeding standards prepared by 

 Wolff, a German investigator In ani- 

 mal nutrition, have been the most 

 widely used of any. These were 

 based largely on the weight of the 

 animal, although an attempt was 

 made to make allowance for the age 

 of the animal and for the kind of 

 work performed. Of late, however, 

 there has been quite a general belief 

 that the standards snould take more 

 account of the amount or character 

 of production. In the case of mlldh 

 cows, for example, it is thought that , 

 the standard should be adapted to the j 

 amount of milk produced, making the 



live weight a matter of secondary 

 consideration. The most Important 

 use of protein In feeding cows Is in 

 the formation of milk. Hence a cow 

 producing 20 quarts of milk per day 

 will require considerably more pro- 

 tein to elaborate this milk than ont 

 giving only eight quarts; and as the 

 milk production of cows bears no 

 particular relation to the live weight, 

 a hundred pounds In weight more or 

 less need make very little difference 

 in the ration. The use of rations 

 varying in accordance with the milk 

 productiom is comparatively simple, 

 as it only requires that the weight of 

 milk given by the different cows be 

 known. Wolff's standards have re- 

 cently been modified by Prof. F. Leh- 

 mann, as the result of additional ex- 

 periments and practical experience, 

 and also in the attempt to adapt 

 them more closely to the practical 

 needs of the animal. 



Wolfe-Lehman Feeding Standards 



Showing amounts of nutrients per 1,000 lbs. live weight for one day's feeding 



Digestible Nutrients 



Total Fuel 



Animal Dry Protein Carbo Fat Value 



Matter Hydrates 



Pounds Pounds Pounds Pounds Pounds 

 Fattening Cattle — 



Firstperiod 30 2.5 15.0 0.5 34,650 



Second period 30 3. 14.5 0.7 35,500 



Third period 26 2.6 15.0 0.7 35,900 



Milch Cows — 



Giving 11 pounds milk a day 25 1.6 10.0 0.3 22,850 



Giving 16>^ pounds milk a day 27 2.0 11.0 0.4 25,850 



Giving 22 pounds milk a day 29 2.5 13.0 0.8 33,700 



Giving 27 K pounds milk a day 32 3.3 13.0 0.8 33,700 



Sheep — 



Coarse wool 20 1.2 10.5 0.2 22,600 



Finewool 23 1.5 12.0 0.3 26,400 



Breeding Ewes with Lambs 25 2.9 15.0 0.5 35,400 



Fattening Sheep — 



Firstperiod 30 3.0 15.0 0.5 35,600 



Second Period 28 3.5 14.5 0.6 36,000 



Horses — 



Light work 20 1.5 9.5 0.4 22,150 



Medium work 24 2.0 11.0 0.6 26,700 



Heavy work 26 2.5 13.3 0.8 32.750 



