SOIL ANALYSIS AND ITS INTERPRETATION 327 



before they can be used for the interpretation of an analysis. 

 A few illustrations are therefore given from Hall and Russell's 

 survey of Kent, Surrey, and Sussex (l2ia) : the data are set 

 out in Table LXXXIV. 



The Chilworth soil contains so little clay and fine silt and 

 so much coarse sand that it has very little power of retaining 

 water. As it lies too high to obtain any seepage water from 

 the neighbouring formations it is dependent on the immediate 

 rainfall, and is therefore not in cultivation but has always been 

 heath land. Owing to its bad constitution and its high situa- 

 tion it could not by any known method be made suitable for 

 farming. 



Table LXXXIV. — Mechanical Analyses of Soils and their Inter-- 



PRETATIONS. 



The Shalford soil lies lower down and has a better water- 

 supply, less coarse sand, and more clay and fine silt. But its 

 water-holding capacity and its retentive power for manures are 

 still very low ; artificial manures are of much less value than 

 organic manures, and the best treatment of the land is to grow 

 green crops and fold them off to sheep. It is better suited to 

 special purposes like the production of malting barley or 

 market-garden crops than to ordinary mixed farming. 



The Goldstone soil contains more clay and fine silt, and 



