TABLE II. 



Wheat grown for forty years in succession on the same land, 



Broadbalk Field, Eothamsted; commencing 1844. 



Results showing the effects of different manures for 32 years, 1852-83 in- 

 clusive. Quantities per acre. Produce DRESSED GRAIN IN BUSHELS. 



Superphosphate, and Sulphates Potash, Soda, and Magnesia. 



AVERAGES. 



IA 



