MANURES. L>6J 



100 kilos of coufri employed one kilo of nitrate of -soda 

 is added to the soil. 



One great objection to the employment of many 

 mounds is their high content of sodium chloride 

 (common salt). 



In many districts the continued use of coufri has been 

 attended with disastrous results to the soil, and salt 

 efflorescences have appeared to such an extent that the 

 land has considerably deteriorated and a discontinuance of 

 the use of the manure has naturally resulted. 



Samples have been found which contain in some instances 

 as much as 5 % or more of common salt, and an application 

 of say 10 tons containing this percentage to a maize crop 

 would add to the soil 1120 Ibs. of common salt. The 

 want of drainage, which is often felt in Lower Egypt 

 naturally aggravates this evil, whereas in Upper Egypt, 

 where drainage is better, the ill-effects are not so apparent. 



The following recent analyses of Lower Egypt heaps, 

 show the excessive percentage of salt sometimes present: 



The average content of common salt in the 8 samples 

 recently analysed in the laboratory of the Society is 2'07. 



