WHEAT 



31 



Total Produce 

 perAcre 



7000 lb.— 



35: 4. 



irain per Mere 



,1b. 



Straw per Acre, lb 



Fig. 8.— Broadbalk Wheat. Effect of increasing amounts of Nitrogen on the production 

 of Wheat (Grain and Straw). Average, 51 years (1 852-1902). 



The figures in the labels indicate bushels of Grain and cwt. of Straw. 



