100 



80 



2 



401- 



> 



C20f- 

 o 



Soil + Aminoniam Sutphd^te. 



TeiTtp. 15°C. 



^ — ' =1 5 % 



■-^0% 



y , 



64-5, 



/ 



/ 



/ 



50-9 



/497, 



/ 7529 



25^ 



^2•2 



^5-8 



59-i 



10^ 



9-^ 



-^•a 



Days 



26 



66 



100 



.3% 



Additione^l Nitra^h fomnd in Soil dvlone. 

 (Lo?\Tin Getting en) 



sor Temp.l5X. 



3% 5% 



Fig. 25. — Effect of moisture on nitrification process in the soil (Traaen). 



