[ 821 ] 



Phosphates 



Crucible and Mg 2 P 2 O 7 and paper 



ash ... ... ... =29-392 



Crucible, and paper ash ... = 29-329 



Mg 2 P 2 O 7 ppt. ='063 



.'. In i gram ... .. ='0063 = -63% 



Pt C/ 4 2KCI 



Crucible and ppt. ... ... =i2"j64$ 



Crucible alone ... ... = 12-6370 



.'. the ppt. in 10 grams ... =-1275 



.'. In i gram ... ... =-01275 = 1-28% 



Pt C1 4 -2KC1 I K 2 O:: 1-28 : K 2 O in 100 of the sample. 



485-5 : 94:: 1-28 : x.\x t or K 2 O in 100 parts of the 



sample ='25% 



(1) Moisture being ... ... ... =2-49% 



The percentage of dry matter ... =97-51 



But loss on ignition ... ... =7-32% 



of which moisture ... ... =2-49% 



(2) /. Organic matter <5rv., =4*83 in 97*51 % of dry matter. 

 .*. In 100 of dry matter the amount of org. matter &c. = 



97-51 : TOO: \ 4-83 : x 



4'8? x 100 



(3) Si O 2 , Silicates 6^ = 83*94 in 97*51 of dry soil. 

 /, In 100 of dry soil, the amount of Silicates &c.= 

 97-51 : ioo*. : 83-94 : x 



97'5i 



(4) Ca C<9 3 =i*o4% in wet soil, /.*., 97-51 of dry. 



97-51 : ioo:: 1-04 : x 



,. x= i^iL =I . 07% 



(5) K%0 ='25 % in th ? wet sample= 



97*51 : ioo:*.*25 : x 



_- 2 SX 1 oo_ = . 260/o 



