176 EXPERIMENTS UPON GRASS LAND 



^o%- 



Fig. 34.— Percentage of ^llopecurus pratensh in the Herbage of the Grass Plots. 

 First Crop, Season 1903. 



Unmanured. Minerals onhj. Nitrogen only. Nitrogen and Minerals. 



4-1. Superphosphate. 5. Amm.-salts. 4-2. No Potash \ a m^ 

 8. No Potash. 17. Nitrate Soda. ' 9. Complete - ^^^^^' 



7. Complete. 11. Excess N. / 



I 14. Complete ; Nit. Soda. 



