THE SOIL. 



25 



ANALYSES OB^ NILE MUD AND EGYPTIAN SOILS. 



All Egyptian soils do not show such a close resemblance 

 in composition to Nile mud as do the delta samples given 

 above. Some contain more sand and some less; while some, 

 particularly in Upper Egypt, contain more calcium carbon- 

 ate, (See the analyses of the Favoum and Matai samples). 



In studying the nature of the soil it is convenient to 

 divide it into five j arts : 



1. The mineral part. The particles of hard rock 



material. 



2. The organic part. Decomposed animal and veget- 



able matter. 



3. The organised part. Worms, insects, plant-roots, 



bacteria, and other organisms, 



