174 EXPERIMENTS UPON GEASS LAND 



sojg- 



40- 



30- 



20- 



10 



Plot 



4-1 



17 



4-2 



FIG. 33. Percentage of Festuca ovina in the Herbage of the Grass Plots. 

 First Crop, Season 1903. 



Unmanured. 



Minerals only. 

 4-1. Superphosphate. 

 8. No Potash. 

 7. Complete. 



Nitrogen only. 



5. Amm. -salts. 



17. Nitrate Soda. 



Nitrogen and Minerals. 

 4-2. NoPotashU mm _ 

 9. Complete \ ,. 

 11. Excess N. J ' 

 14. Complete ; Nit. Soda. 



