310 



ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 



TABLE 1. — Yields of Crops Raised, Bushels, Pounds and Digestible 

 Nutrients Per Acre.*. 



Crop 



Yield 



per acre 



Amount 



Pounds 



Digestible nutrients 



Prot. Total 



Carbo. Total 



Fat 



x2.25 



Total 



Total per 

 crop 



Oats (grain) . . 50 bu. 1600 147 

 Oat straw 1600 1b. 1600 19 



757 

 618 



151 

 29 



1055 

 666 











166 



1375 





180 



1721 



Corn (grain) . 



55 bu. 



3080 



240 



2054 





297 



2591 





Corn Stover. 



2 T. 



4000 



68 



1296 





63 



1427 





308 



3350 



360 



4018 



Timothy hay..iy 2 T. 3000 84 



Clover hay 2y 2 T. 5000 340 



Alfalfa hay.... 4 T. 8000 880 



Pasture z 160 



1302 



95 



1790 



191 



3168 



216 



585 



101 



1481 



2321 



4264 



846 



From the compositions as given above is derived the com- 

 parative production of food value of the four systems of crop- 

 ping for dairy purposes, as tabulated in Table 2. 



TABLE 2. — Relative Amounts of Available Digestible Nutrients Produced 

 Annually on a 160-Acre Farm by Each of the Four Systems. 



System 



Protein 



Carbohydrate 



FatX2.25 



Total 

 Nutrients 



No. 1 ..... 



No. 2 



No. 3 



No. 4 



. . . 26,804 

 ... 35,024 



... 48,850 

 . . . . 80,237 



192,460 

 255,479 

 296,20,4 

 491,249 



25,918 

 31,856 

 34,072 

 46,244 



245,182 

 322,359 

 379,126 

 617,730 













* Dairymen who have farms less productive, or who for any reason 

 get smaller yields, must scale down the final results in proportion to the 

 crops obtained, and those who can produce greater yields should raise 

 the results proportionately. 



zThe amount of digestible nutrients produced per acre by pasture 

 grass was determined by averaging all of the abailable data upon this 

 subject. 



