[ 820 ] 



Watch-glasses and clip and dried 

 soil 



/. Moisture in 3 grams 

 /. In i gram= f o249 gram ... 

 Loss on ignition 



Crucible and soil 

 Crucible alone 

 After ignition 

 /. Loss on ignition ... 

 .*. In i gram =-0732 gram 

 Silicates and other insoluble matter 



Crucible and insoluble residue ... 

 Crucible alone 



.*. Insoluble residue in 10 grams... 

 Deducting -002 for paper ash 



Soluble salts 



Beaker and soluble salts 

 Beaker alone 

 Soluble salts in 10 grams 



= 2 7 - 2960 grams 

 07.47 



= 2-49' 



= 39328 

 =29-328 



= 38-596 

 = 732 



= 37 724 



= 29-328 

 =8-396 grams 

 = 8-394 



= 20-3080 grams 

 ... =20-2465 



= 0615 



= 615% 

 Nitrogen 



5o + 47'2 = 97 - 2 c.c. of the standard solution of NaHO 

 were required to neutralize 20 c.c. of the standard 

 H 2 SO 4 solution after titration. 



.*. 2-8 c.c. of the NaHO was replaced by NH 3 from 

 the soil. 



But r c.c. of the alkali represents -0031095 grams of N. 



.*. 2'8 c.c. represents '0087066 grams of N in 5 grams 



=174% 



Lime* 



Crucible and Ca CDs ppt. and paper 



ash ... ... ... =29-433 



Crucible alone ... ... =29-327 



Deducting -002 for filter-paper ash, 

 CaCOs in 10 grams 



106 

 002 



= '104 



= '04% 



