137 



A typical soil of the district, which has been under tea for 15 to 

 20 years, gave on analyses the following figures : 



"Organic Matter, &c. 



Oxide of Iron 



Alumina 



Lime 



Magnesia 



Potash 



Soda 



Phosphoric Acid 



Sulphuric Acid 



Insoluble Silicates (Sand) 



'Containing Nitroger. 



Salonah 

 Typical Soil. 



3-29 

 6-84 



27 

 32 

 'IS 

 04 



"02 



lOO'OO 



09 



CONCLUSION 



Such are the various districts of Assam. The methods of 

 manuring recommended are based on the necessity for the addition 

 of organic matter and nitrogen in almost every case, of phosphates 

 often, and occasionally of potash. In a heavy soil generally speaking 

 green manuring crops previously manured with phosphates give the 

 best method ; in a light one usually cattle manure or oilcake, also 

 with green manuring, form the best addition, taking into consider- 

 ation the ultimate object of all manuring, the maximum improve- 

 ment of the crop at the minimum of cost. 



[ 1,000 13-1 1-1901. ] 



