270 SOUTHEBN FIELD CROPS 



seed meal is not twice as rich as cotton seed. The exchange 

 values of these two foods will depend upon many condi- 

 tions, especially the kind of roughage to be fed in connec- 

 tion with either, the purpose in view, and other matters 

 that find a place in textbooks on feeding animals. In 

 tests at the Mississippi Experiment Station, a pound of 

 cotton-seed meal was in one case equal as food to 1.6 pounds 

 of cotton seed, and in another case to 1.7 pounds. 



In general, one may expect a ton of cotton seed to have 

 the same feeding value as an amount of cotton-seed meal 

 varying between 1250 and 1500 pounds. 



245. Composition of the different parts of the plant. — 

 The stems contain nearly one fourth of the dry matter, 

 the leaves and seeds each a little more than one fifth, and 

 the lint only one ninth of the total dry matter in the 

 mature plant. The seed and Hnt, which are usually the 

 only portions of the plant removed from the land, together 

 constitute one third of the total weight of dry matter. 

 However, the proportion of seed and lint to other parts of 

 the plant varies widely according to the luxuriance of 

 growth and other conditions. Doubtless the seed and lint 

 together often constitute less than one third of the total 

 weight of the plant. 



The above statements are based on the following figures, 

 giving the average results of a chemical study of the different 

 parts of the cotton plant as made by B. B. Ross at the Alabama 

 Experiment Station (Bulletin No. 107), and by J. B. McBryde 

 at the South Carolina Experiment Station. (See Bui., Vol. IV, 

 No. 5, Tenn. Expr. Sta.) 



These figures show the amounts, and proportions by weight, 

 of the different parts of the mature dry cotton plants growing on 

 an acre where the yield of lint is 300 pounds : — 



