APPENDIX 



425 



Table V. Modified Wolff-Lehmann Feeding Standards foe 



Farm Animals 



Recent investigations of the Experiment Stations of this and other countries 

 have shown that the original Wolff-Lehmann Standards are inaccurate in many 

 instances. Therefore, the following standards have been presented by the authors 

 to provide a more accurate means of computing rations substantially according 

 to the Wolff-Lehmann method. The sources of the recommendations given for the 

 various classes of animals are shown in Chapter VII and the method of computing 

 rations in accordance with these standards is fully explained in Chapters VII and 

 VIII. Modified standards are not presented for growing dairy cattle, growing 

 sheep, and growing pigs (breeding stock), on account of the lack of sufficient data. 



In most instances a minimum and a maximum are indicated for dry matter, 

 digestible crude protein, and total digestible nutrients. As has been pointed out 

 in the text, when protein-rich feeds are cheaper than carbonaceous feeds, some- 

 what more digestible crude protein may be supplied than is stated in the standards. 

 This will narrow the nutritive ratio beyond the limits here indicated. On the 

 other hand, the amount of protein should not fall much below the lower amount 

 indicated. 



The amount of dry matter to be fed daily per 1,000 lbs. live weight to dairy 

 cows may range from 15.0 lbs. or even less with dry cows to 30.0 lbs. with cows 

 yielding 2.0 lbs. of butter fat per head daily. Cows producing 1.0 lb. of fat per 

 head daily should receive about 21.0 to 25.0 lbs. of dry matter daily per 1,000 lbs- 

 live weight. The nutritive ratio may readilv be found by computation; for 

 example, a 1,200-lb. cow yielding daily 30.0 lbs. of 3.5 per ct. milk will require 

 for maintenance and production 2.31 to 2.67 lbs. digestible crude protein and 

 18.99 lbs. total digestible nutrients. The nutritive ratio should hence not be 

 wider than 1:6.1 to 1:7.2. 



The standards given under Division 2 for growing, fattening steers weighing 

 1,000 to 1,200 lbs. are for animals being finished on a moderate allowance of 

 concentrates. It will be noted that the amount of total digestible nutrients 

 is considerably lower than the amount indicated under Division 3 for fattening 

 2-year-old steers on full feed. As has been pointed out in the text, cattle 

 fed a small allowance of concentrates will not make maximum gains. However, 

 under certain conditions this system may return the most profit. 



