APPENDIX 357 



For green cock's-foot grass in flower there are, 

 according to Table I, the following amounts of 

 digestible nutrients : — 



i "o% protein xo*94 .... =0^94% starch equivalent 

 0-4,, fat xi'9i . . . . =076,, „ „ 



9-5 „ nitrogen-free extract 1 - « 



43 „ crude fibre . . / I 3 5X l ° "U* »i » 



Deduct 7 "3% crude fibre x 0*36 2*6 „ „ „ 



I2"9% starch equivalent 



Without any serious error the calculations can 

 be simplified by reckoning 2-2 starch equivalent 

 for 1 part digestible fat in all food-stuffs. 



After finding the amount of digestible protein in 

 the foods which are to compose the ration and the 

 starch equivalents, Table III must then be turned 

 to in order to find in what proportions the foods 

 must be used. As some of the feeding-stuffs have 

 almost certainly been grown on the farm, it must 

 first of all be decided what quantities of hay, straw, 

 mangels, etc. can be spared for each branch of 

 stock per head per day, so that the supply is enough 

 for the time during which this particular ration is 

 to be fed. 



Suppose that for cows weighing 1000 lbs. and 

 giving 20 lbs. milk, there are, after deducting straw 

 for litter, 30 lbs. mangels, 8 lbs. meadow hay, 

 10 lbs. straw available ; also that brewers' grains 

 are cheap, and 25 lbs. may be given. From 



