44 



DIFFUSION OF SOIL NUTRIENTS . 



warren ton g;iv©t th» relative diffusion of salts as 

 detdrmln€'d by Marignae, as shown in T^ble XVIII. 



Tabl« XVIII J Selativa riffueion Co6»ffieient8 of Salts. 



Raittiv© riffueibility 

 of AeidB 

 Potaeaium S&ite 

 Chloride 114 Potassiiaa 

 100 Ammonia 

 60 Soda 

 60 Caleium 

 Magnesiuia 



Reiativ© Ciffusibiiity 

 of Easio 

 Chlorides Sulphate* Nitrates 



Nitrate 



Sulphate 



Carbonate 



1.56 



1.25 



1.00 



.65 



,55 



1.46 



1.00 



.51 



1.55 



1.00 

 .66 

 .64 



There seens to be a discrepancy in the results in the 

 relative diffusibiiity of the chloride and nitrate of po- 

 tassium b«ving in ont< case 1.14 and 1.00 respectively, and 

 in the other 1.56 and i.55. Th=& table, however, shows that 

 salts containing the bases potasaiura and aiiuaonie a^ the 

 acids chlorine and nitrogen are relatively highly 

 diffusible. 



fhen the saiis ars diffusing together, the rat» is 

 slightly different from that where diffusing separately. 

 "The rat© of diffusion of the nore diffusiblo salts is 

 generally very nearly what it would be if diffused alone, 



