113 



is usually found a blue clay, and where this approaches anywhere 

 near the surface, the limited root range causes the soil to be exhausted 

 comparatively early, 



The best manure for these gardens will be cattle manure 

 followed by green manuring, the former being applied in spring, 

 at about 5 to 10 tons per acre. (l Sau" trees will be here of great 

 advantage, and should undoubtedly be planted among the tea. 

 Basic Slag followed by a green manuring crop (see page 97} will 

 also be an alternative, but in any case the gardens in this section 

 will rapidly deteriorate unless manured. 



BISHNAUTH DISTRICT. 



To the east of the Borelli river lies the Bishnauth district, 

 which resembles that of Tezpur in the various types of soil found 

 there. There is here, for instance, a bank of red soil, apparently 

 originally forming one with that of Tezpur. It seems, however, 

 decidedly heavier and more clayey than the latter, but there lie 

 on it several of the best gardens in the district. 



The following is the analysis of a soil on this bank, perhaps, 

 however, a little more clayey than the average : 



Containing Nitrogen . 



100-00 

 '13 



That is to say, there is roughly double as much clay as in the 

 samples analysed from the Tezpur bank in the apparently very 

 similar Sonajuli soil. The agricultural result of this will be to 

 emphasize (i) the lasting character of the soil, provided organic 

 matter and phosphoric acid be kept present in sufficient quantity ; (2) 

 the necessity of thorough and frequent cultivation, or else the soil 



