BARLEY 



39 



Total Produce 

 per Acre. 



> lb. 

 sooo 



4^000 



5000 



Nitrogen 



and 



Potash. 



Nitrogen, 

 Phosphoric Acid 

 and 

 Potash. 



Grain per Acre ,lh 



Straw per Acre, lb. 



Fig. 12. — Effect of Mineral Manures on the yield of Barley (Grain and Straw). 

 Mean of Series A, AA, and C. 51 years (1852-1902). 



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



