178 EXPERIMENTS UPON GRASS LAND 



502- 



Plot 



FIG. 35. Percentage of Arrhenatherum avenaceum in the Herbage of the Grass Plots. 



First Crop, Season 1903. 



Unmanured. 



Minerals only. 

 4-1. Superphosphate. 

 8. No Potash. 

 7. Complete. 



Nitrogen only. 



6. Aram. -salts. 



17 Nitrate Soda. 



Nitrogen and Minerals. 

 4-2. No Potash lAmmi _ 

 9. Complete 

 11. Excess N. J ' 

 14. Complete ; Nit. Soda. 



