PRODUCING MARKET MILK IN EASTERN NEBRASKA. 9 
FACTORS INVOLVED IN THE PRODUCTION OF MILK. 
FEED. 
Concentrates, in the meaning of this study, are grains and their 
by-products prepared for feeding. 
Home-grown grains are concentrates grown on the farm or in the 
locality where fed. 
Dry roughage includes various hays and other bulky feeds. Dry 
roughage is subdivided into the three following classes : 
Noncommercial dry roughage applies to coarse feeds, such as corn 
stover and velvet-grass hay, for which price quotations are not given 
Fig 2.— Barn arid silos on one of the farms studied. 
in the trade papers. Hay or other dry roughage so foul with weeds 
or so damaged in curing as not to be readily salable is also classified 
under this heading. 
Commercial legume hay includes alfalfa, clover, cowpea, soy-bean, 
and other marketable legume hays, when pure, or when so slightly 
mixed with grasses as not materially to affect the protein content. 
Commercial carbohydrate hay refers to all marketable hays except 
those classified as legume hay. 
Succulent roughage consists of mangels, potatoes, silage, and soiling 
crops. 
The quantities of the various feeds used were obtained from actual 
weights made by the field agent on his regular monthly visit to each 
farm. 
