356 SCIENTIFIC FEEDING OF ANIMALS 



coarse fodders (hay and straw), it is advisable not 

 to make use of the value number, but to deduct 

 0-58 from the starch equivalent, as calculated above 

 for each per cent of crude fibre (not the digestible, 

 be it noted) in the food. 



Chaff is treated in the same way, a deduction 

 of 0-29 being made for each 1 % crude fibre. With 

 green fodders the starch equivalent depends also 

 upon the amount of crude fibre ; where the amount 

 in the green fodder is 16 % and more, a deduction 

 of 0-58 starch equivalent ; whereas, if the amount 

 of crude fibre is 4 % or less, the deduction is only 0-29 

 starch equivalent. For intermediate quantities of 

 crude fibre a proportionate deduction has to be 

 made : e.g. 0-34 for each per cent crude fibre 

 in green fodder where the total is 6 % ; 0-38 

 where the total is 8 % ; 0-43 where it is 10 %; 

 0-48 where it is 12 % ; and 0-53 where it is 



14 %• 



Two typical cases are shown below. Spring 

 cereal straw contains, according to Table I, the 

 following digestible nutrients : — 



ro % protein x 0*94 . . . .= 0*94 % starch equivalent 

 0-4,, fat xi-Qi . 076,, „ „ 



i8'5 „ nitrogen-free extract! 6x ro = 39 -6o M „ 



2 vi „ crude fibre . .J ' J * " " " 



4i'30» n n 



Deduct 39 % crude fibre x 0*58 22.6 „ „ „ 



187% starch equivalent 



