164 ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 



Total 

 System. Protein. Carbohydrates. Fat Nutrients 



No. i 26,804 192,460 1^519 230,782 



No. 2 35,o 2 4 255,479 I4J5 8 304,661 



No. 3 48,850 296,204 15,143 360,197 



No. 4 80,237 49 I > 2 49 20,553 592,039 



This shows in a striking manner the inefficiency of System 

 No. 1, because of the comparatively large acreage devoted to 

 crops yielding a small amount of nutrients per acre. In strik- 

 ing contrast to this is the great amount of nutrients produced 

 by system No. 4, devoted to corn and alfalfa, the protein being 

 three times, and the total nutrients 2 l / 2 times that produced by 

 system No. 1. Systems No. 2 and No. 3 are intermediate be- 

 tween these and show how a dairyman may gradually work his 

 way, by a mere change of cropping, from the first to the fourth 

 system, if a sudden change is thought too raidcal. System No. 

 4 requires more labor, but where this can be obtained and used 

 to advantage this system will be increasingly profitable as land 

 becomes higher priced. 



The figures here shown do not tell the full story because 

 the poorer rotation will gradually run down the land so that it 

 will produce smaller yields, while with the better rotation, land 

 will tend to increase in producing power, growing larger crops, 

 thereby increasing the pounds of milk and profit per acre, year 

 after year. 



Poor Feed Lowers Production: Just Basis. 



As the main object is to show approximately the amount 

 of milk produced per acre, under each of the different systems, 

 it is essential that a definite basis of production per cow be used, 

 and for this purpose in all cases there are taken good grade 

 cows, weighing 1100 pounds, that will produce an average of 

 6,000 pounds of 4 per cent milk a year when well fed on a bal- 

 anced ration, such as can be produced by systems No. 3 and No. 

 4. Under system No. 1, cows of this efficiency will produce only 



