E. J. Russell and J. A. Prescott 



99 



Table VII (continued). 



N/10 HNO^ 



Time = 24 hours. 



P,Og added (mgms. per 

 "lOOOc.c.) 



P2O5 found in solution (C) 

 (mgms. per 1000 c.c. ) 



PoOg left in soil (y) (mgms. 

 "perlOOgms.) | 21-4 



45-7 

 13-7 

 57-0 



Equation obtained : y = 9-4: CI "5 . 



Hoos 2C soil. N /lO HNO^. Time =^ I hour. Temperature 2^° C. 



50 gms. of soil to 1000 c.c. of solution. 

 P2O5 brought out by diffusion =110 mgms. per 100 gms. of soil. 



P2O5 added (mgms. per 

 lOOOc.c.) 



P2O5 found in solution (C) 

 (mgms. per lOOOc.c.) 



P2O5 left in soil (y) (mgms. 

 per 100 gms.) 



65-5 

 84-1 



70-8 



Equation obtained : y = 19-7 C3-6 . 



Time ^ 24: hours. N /lO HNO^. 



P2O5 added (mgms. per 

 lOOOc.c.) 



PoOj found in solution (C) 

 (ni'.'ms. per lOOOc.c.) 



P2O5 l(!ft in soil (y) (mgms. 

 per 100 gms.) 



421 



57 

 80-3 



Equation obtained : y = 120 C2 1 . 



Wohurn wheat (unmanured) . 



Time = 1 hour. N/IO HNO^. Temperature 23° C. 



100 gms. of soil to 1000 c.c. of solution. 

 P2O5 brought out by diffusion = 39 mgms. per 100 gms. of soil. 



P20g added (mgms. per | | 



lOOOc.c.) I I 



P2O5 found in solution (C) ■ 



(mgms. per lOOOc.c.) ... i 2-7 1 3-2 



P^Os left in soil (y) (mgms. 



"perlOOgms.) 36-3 I 35- 



5 



6-2 

 38-3 



110 



41-2 



16-6 

 12-6 

 430 



221 

 161 

 45-0 



331 

 23-6 

 48-5 



44-2 55-2 

 32-8 I 40-3 

 50-4 53-9 



Equation obtained : y = 30-7 C6-2 . 



7—2 



