98 Dilute Acids and Phosphorus Compounds in the Soil 



Table VII {continued). 



Saxmundham. Plot 6 {unmanured). 



Time= 2 hours. NJlO HNO^. Temperature 23° (7. 



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



P2O5 brought out by diffusion = 17 mgms. per 100 gms. of soil. 



PjOg added (mgms. per 

 lOOOc.c.) 



P2O5 found in solution {0) 

 (miim.s. j)er 1000 c.c.) ... 



P2O5 left in soil (y) (mgms. 

 per 100 gms.) 



66-2 

 51-8 

 46-2 



Equation obtained : 2/ = 6-3C2"0. 



Saxmundham. Plot 4 (superphosphate). 



Time = 2 hours. N jlO HNO^. Temperature 23° C. 



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



P2O5 brought out by diffusion = 26 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.) 



G6-2 

 611 

 36-3 



Equation obtained : y — 7Q C2"7 . 



Agdell soil. N /lO HNO3. Time = 0. 



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



P2O5 brought out by diffusion = 25 mgms. per 100 gms. of soil. 



P2O5 added fmgms. per 

 lOOOc.c.) ' 



P2O5 found in solution (C) 

 (mgms. per lOOOc.c.) 



P2O5 left in soil {y) (mgms. 

 per 100 gms.) 



45-7 

 361 

 34-7 



Equation obtained: ?/ = ll-5C'3'l , 



