Nitragin 



some years. The uncleaned waste skin also takes 

 a long time to decompose. This is why they are 

 good for sandy soils intended for practically per- 

 manent crops, which exclude the possibility of 

 administering fresh supplies of organic matter to 

 retain the humus. They should be applied in the 

 year the plantation is made, and previous to that 

 in quantities of about 8 cwt. of skin waste to the 

 acre in addition to farmyard manure. 



In subsequent years liquid and chemical manures 

 should be given. The skin waste will operate for 

 three or four years in preventing the destruction of 

 humus. Where it is available it may be used, as 

 from practice we know that under certain conditions 

 it is extremely useful, and with its help profitable 

 nurseries may be established in sandy soil. This 

 shows that under certain circumstances one is justi- 

 fied in employing manures of which the organic 

 matter is of slow decomposition. 



Wool waste could be employed in the same 

 manner. Cotton waste does not contain any 

 nitrogen. 



Nitragin. 



In the nodules of their roots the leguminosae 

 have colonies of nitrogenous bacteria. These bac- 

 teria, without differing essentially in themselves, 

 are, however, so much more active according as they 

 are adapted to such and such a variety of legumi- 

 nosse. That is why cuttings of nitrogenous bacteria 

 were commercially prepared for each variety. It 

 was sufficient to dilute the culture, and sprinkle the 

 soil with the solution. This operation was called 



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