CHAPTEE XXII 



FEEDING DAIRY CATTLE 



Feeding Standards for Dairy Cows. — In studying the best 

 methods of feeding dairy cows, the leading standards should be 

 kept well in mind. 



/. The Wolff-Lehmann Standards for Dairy Cows — 1000 pounds live weight 



* Given separately by Wolff-Lehmann. 



r 



II. The Armsby Standards for Dairy Cows 



For maintenance per 1000 pounds 



Per pound of average milk (13 per cent solids, 4 per 

 cent fat) 



Digestible 

 protein, 

 pound 



.5 

 .05 



Energy 

 values, 

 therms 



6.0 

 .3 



The dairy cow is kept primarily for producing milk, one of 

 the most valuable human foods and the raw material for the manu- 

 facture of butter, cheese, and other dairy products. Through 

 selection, liberal feeding, and careful management, the cow has 

 gradually been developed to her present wonderful capacity for 

 dairy production. The average production of many dairy herds 

 at the present time exceeds one pound of butter fat per head for 

 each day in the year, or over 3'60 pounds for the year. Cows hold- 

 ing production records for milk and butter fat have, however, 

 exceeded this amount many times, producing, respectively, over 

 thirty-three thousand pounds of milk and twelve hundred pounds 

 of butter fat in a year.* 



1 Records of yearly production (1920), Tilly Alcartra 123459, 33,425.3 

 pounds milk; Duchess Skylark Ormsby, 124,514, 1205.09 pounds butter fat, 



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