THE SOIL 



59 



56.6 bu. 



Coi 



Oats 



systems of farming, grain farming and live-stock farm- 

 ing. Hopkins* explains this method as follows : 



"Under the 

 live stock sys- 

 tem of manage- 

 ment the nitro- 

 gen and 'organic 

 matter of the 

 soil are main- 

 tained by apply- 

 ing as much 

 manure as can 

 be made from 

 the produce 

 grown upon the 

 land. On this 

 basis no more 

 manure is ap- 

 plied to a plot 

 than can be 

 made from the 

 produce of that 



R.L.P 75-1- bu. 



M.L.P 72.6 bu. 



I 4-7 6 bu. 



R.L.P 64--2 bu. 



M.L.P 635bu. 



Jbu 



Wheat 



M.L.P. 4-01 bu 



Fig. 20. Illinois Fertilizer Experiment. 



O. Untreated land; R. Residues; M. Manure ap- 

 plied; L. Limestone; P. Phosphorus. Showing in- 

 creased yields by rational soil treatment. Note 

 that the grain system of farming (R.L.P.) is in 

 every case slightly ahead of the live stock sys- 

 tem (M.L.P.). 



plot. For every 



ton of produce grown, an equivalent amount of average 

 farm manure is returned during the rotation. Under a 

 good system of live stock farming it has been found that 

 about one ton of average manure can be made from one 

 ton of feed and bedding. A large amount of the grain 

 produced is fed, in the live stock system, the legumes har- 

 vested as hay, and the hay, straw and stover used for 

 feeding and bedding purposes." 



Ibid. 



