148 



MASS. EXPEEIMENT STATION BULLETIN 230 



The Results 



Relative Growth, Gains and Costs of Rearing Calves on Skim Milk Powders 



Material 



Skim milk powder 



(dnim process) 

 Skim milk powder 



(spray process) 

 Liquid skim milk 



for comparison 



* All grade Holstein calves. 



Liquid skim milk was charged at I'/g cents a quart, drum dried powder Ty, 

 cents and spray dried powder 11 cents a pound (drum dried solution, 1.9 and 

 spray dried solution, 2.75 cents a quart). The table shows: 



1. That neither skim milk powder promoted 

 liquid skim milk. 



as rapid growth as did tlie 



2. That the drum process powder produced slightly better growth than did 

 the spray process powder. The difference is not great and too much stress 

 should not be placed upon it. Inasmuch, however, as the drum dried powder 

 may often be purchased for several cents a pound less, it is to be preferred 

 for calf feeding. 



3. Dried skim milk offers the best substitute for liquid skim milk in the 

 rearing of young calves. At the present, the price has advanced to 11 cents 

 for the drum dried and ISyo per pound for the spray dried, which renders 

 their use of doubtful economic value. The price will vary according to supply 

 and demand. 



BETTER FEED FROM PERMANENT PASTURES 

 By SIDNEY B. HASKELL 



In tlie spring of 1921 the Massachusetts Experiment Station instituted cer- 

 tain fertilizer experiments on a typical, rock-bound, weed-grown permanent 

 pasture. The pasture must have been last plowed more than 100 years ago, 

 in the days of cheap labor and ox team power. A part of the pasture had 

 once been tilled, had degenerated into pasture, had then grown a crop of wood 

 and timber; and then after many years had been brought back to pasture in 

 a century-long rotation. Of clover and blue grass there were but the scanti- 

 est traces. Running cinquefoil and great clumps of green moss had crowded 

 out the better types of vegetation. 



