Massachusetts 

 Agricultural Experiment Station 



BULLETIN No. 255 November, 1929 



Studies in Mineral Nutrition 



By J. B. Lindsey and J. G. Archibald 



It was formerly held that the dairy animal obtained sufficient mineral 

 matter from the roughages and grains consumed. More recently, based 

 on some experimental evidence, this opinion has been questioned, and 

 many have advised the feeding of supplementary minerals in the form of 

 ground bone, ground limestone and the like. In order to get additional 

 light upon the subject, this Station has conducted experiments with 

 growing and mature dairy animals and presents its findings in Part I 

 of this bulletin. 



As a part of the work, many determinations were made of the mineral 

 constituents of the grains and roughages fed, and likewise of the amount 

 found in the ordinary roughages grow^n in different sections of Massa- 

 chusetts. These analyses are brought together in Part II of this bulletin. 



Requests for Bulletins should be addressed to the 



AGRICULTURAL EXPERIMENT STATION, 

 AMHERST, MASS. 



