CHAPTER XIX 
COMPOSITION, FERTILIZER AND COEFFICIENT 
TABLES 
Tus chapter contains tables showing the aver- 
age composition of American forage crops and 
feed stuffs, together with the fertilizer constitu- 
ents contained in them, and the average coeffi- 
cients of digestibility. 
The analyses represent the average as near as 
may be, although it should be understood that 
average compositions of products of varying qual- 
ity are a guide only when accompanied with 
knowledge of the possible variations that may 
occur; they are chiefly useful in showing differ- 
ences in the composition of groups, rather than 
giving exact information as to what may be ex- 
pected under different conditions. This is particu- 
larly true in the case of crops used for green 
forage, as the range in content of dry matter is 
very wide, owing to the necessity of beginning to 
harvest when the plants are immature and con- 
tinuing it so long as they remain palatable. The 
composition of fine feeds also varies widely, 
although it is possible now to so classify as to 
eliminate the variations that formerly existed. 
(344) 
