33 



The following table gives a summary of yields of dry matter 

 on an acre basis: 



Summary of Yield of Oats. 



General Conclusions 



The following table shows the increase in dry matter due to the 

 several fertilizers on the basis of the no fertilizer plats at 100. 



Although the above experiments indicate that apparent slight 

 benefits have resulted from the use of the ground rock fertilizers, 

 yet they also prove that the extravagant claims made by the manu- 

 facturers of these products are in no way confirmed. It should be 



