126 Feeds and Feeding. 



oats has the same feeding value as the unit standard, 1 lb. of corn. 

 Of the roughages, 2.5 lbs. of good hay or 8 lbs. of silage, green 

 clover, or mixed fresh grasses counts as 1 unit. The grass con- 

 sumed by a cow at pasture during 1 day is valued at from 10 to 

 16 units according to its quality and the production of the cow. 



148. The Scandinavian feeding standard.— In the table which 

 follows, Hansson has formulated the unit feed requirements for 

 cows yielding different amounts of milk, based especially on the 

 findings of the cow-testing associations in Southern Sweden.^ 



The table sets forth that a cow yielding not over 13 lbs. of milk 

 daily requires 11 feed units, containing 1.1 lbs. of digestible pro- 

 tein, while one yielding 44 lbs. of milk daily requires 22 feed units, 

 containing 2.75 lbs. of digestible protein. The standard assumes 

 that for maintenance the cow requires about 1 feed unit for every 

 150 lbs. of body w^eight, and 1 unit additional for each 3 lbs. of 

 milk produced. The ration should contain not less than 0.065 lb. 

 of digestible protein per 100 lbs. of live weight, and 0.045 to 0.05 

 lb. of digestible protein additional for each lb. of milk produced. 



149. An example.— The following illustrates the Scandinavian 

 method of comparing feed consumption and milk production : 



If during a month a cow has consumed 240 lbs. of hay, 1000 lbs. 

 of silage, 60 lbs. each of barley and ground corn, and 90 lbs. of 

 linseed oil meal, the calculation based on the valuation table would 

 be as follows : 



Feed consumed Lbs. for 1 unit Feed units 



240 lbs. hay -^ 2.5 = 96 



1000 lbs. silage -^ 8.0 = 125 



120 lbs. corn and barley ^ 10 = 120 



90 lbs. oil meal \ - 0.9 = 100 



Total feed units = 441 



^K. Lantbr. Akad. Handl. 47, 1908, parts I, II, p. 60; Fiihling's Landw. Ztg., 

 57, p. 435. 



