14 FEEDS AND FEEDING, ABRIDGED 



tiate feeding stuffs of a coarse, bulky nature from those which are 

 more condensed and nutritious. 



Concentrates are feeding stuffs of condensed nature, which are low 

 in liber and hence furnish a large amount of digestible matter. 

 Examples of this class of feeds are the various grains, as Indian corn, 

 wheat, and oats, and milling by-products of high feeding value, as 

 wheat bran, linseed meal, gluten feed, etc. 



Roughages are the coarser feeding stuffs, which are high in fiber and 

 supply a lower percentage of digestible matter. Such feeds as hay, 

 corn fodder, straw, and silage belong to this class. Some of the low- 

 grade milling by-products, such as oat hulls, ground corncobs, and 

 peanut hulls are roughages, rather than concentrates, for the}^ are 

 largely fiber and furnish but little nutriment. Roots are watery and 

 bulky, and contain relatively little nutriment per pound, yet based 

 on the composition of the dry substance they are more like concen- 

 trates than roughages, as they are low in fiber. They are really 

 watery, or diluted, concentrates, tho for convenience they are included 

 under fresh green roughages in Appendix Table I. 



III. The Study of an Acre of Corn 



The manner in which plants grow and store nutrients is well shown 

 by a study of Indian corn, the greatest of our agricultural plants. 



Changes in a growing corn crop. — By analyzing corn plants at 

 various stages from July 24, when they were about 4 ft. high, until 

 Oct. 8, when the kernels were hard, Jones of the Indiana Station ^ 

 secured the following data, based on an average stand of 10,000 stalks 

 per acre. 



Cofupositiou of an acre of Indian corn at different stages 



From July 24, at a stage when sometimes unwisely fed as soilage, 

 to Aug. 28, when the silks were drying, the crop increased over 

 19,000 lbs. in total weight and nearly 4,000 lbs. in dry matter. The 



ilnd. Bui. 175; see also Ladd, N. Y. (Geneva) Rpt. 1889. 



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