360 The Effect of Potassium Salts on Dactylis glomerata 



hay16 51 JuneS 15 26 



Fig. 12. Mean thickness of walls, sclerenchynia, in presence of added potash. 

 Full line ^^ Plot 7, no nitrogenous fertiliser added. 

 Broken line - - - Plot 9, nitrogenous fertiliser added. 



May 16 



31. Juneft. 15. 26. 



Fig. 13. Mean diameter of luinina, sclerenchynia, in presence of added potash. 

 Full line ^— i Plot 7, no nitrogenous fertiliser added. 



Broken line 



Plot 9. nitrogenous fertiliser added. 



