264 



Missouri Agricultural Report, 



was maintained with a slight increase. When the proportion of 

 cattle decreased, then the yield fell off, and Missouri is giving us 

 the same history over again that we have experienced in Ohio. 



I said that about 1880 we began to use commercial fertilizers. 

 On chart III I have shown the amount expended annually for fer- 

 tilizers in the different sections of the State during the ten years, 

 1880-89. This expenditure is calculated per acre of wheat, because 

 the fertilizers were used almost exclusively on the wheat crop. You 

 will notice it is in Eastern, and to some extent in Southern Ohio, that 

 these fertilizers have been used. In the northwestern part of the 

 State, in what was once known as the Great Black Swamp, there 

 was practically no expenditure for such fertilizers during this per- 

 iod. 



CHART III. 



WILLJAMB 



Average cost of fertilizer per;"aicre sown in wheat, WO-m. 



