GRASS FOR HAY 



23 



Cwt.perAcre 

 60 



Plots 3&I2 



Fig. 7. — Effect of Nitrogenous Manures on the produce of Hay per acre. Average 

 over 47 years (1856-1902). 



Plot 3 and 12. Unmanured. 



Plot 7. Complete Mineral Manure, no Nitrogen. 

 Plot 9. Do. and Amm.-salts = 86 lb. N. 



Plot 11. Do. do. =129 lb. N. 



Plot 16. Do. and Nitrate of Soda = 43 lb. N. 



Plot 14. Do. do. =861b. N. 



Changes in the Herbage Jbllowing changes in Manuring 



Plot 6 was up to 1868 manured with ammonium-salts alone, like the 

 adjoining Plot 5 : the ammonium-salts were then replaced by a complete 



