176 



EXPERIMENTS UPON GRASS LAND 



30%- 



25 



20 



15 



Plot 



FIG. 34. Percentage of A lopecurus pratensis 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. No Potash^ . 



_ ,: . I Amm.- 

 9. Complete Y saltg> 



11. Excess N. J 



14. Complete ; Nit. Soda. 



