Profits in dairy operations are determined largely by the roughages available on a dairy farm. Successful dairymen plan feeding practices according to the roughages they have at hand. The kind and amount of grain they feed depends upon the roughage, being employed largely to supplement any possible deficiency in the roughages.
Kildee, H. H.; Weaver, Earl; Shaw, John M.; and Ely, Fordyce
"Succulent feeds for dairy cows in summer,"
Bulletin: Vol. 19
, Article 1.
Available at: https://lib.dr.iastate.edu/bulletin/vol19/iss231/1