4<jU 



Sluflies of (( Scoltixh Drift Soil 



Table I. Mechanical Ar\aJy.sis. Dried at \m° C 



Kne gravel 



Coarse sand 



Fine sand 



Silt 



Fine silt... 



Clay 



Approx. diam. 

 in millimetres 



3-1 



1-2 

 •2 -04 

 •04 -01 

 •01 -002 

 •002-0 



Dried at 

 100° C. 



per cent. 

 1009 

 3008 

 26^20 

 1418 

 9-62 

 8-88 



After 

 ignition 



per cent. 



993 



29^73 



25-80 



12^47 



7^63 



3-80 



Total of above 



Loss on ignition 

 Dissolved (by difTeronce) 



99-05 



8936 

 9-69 

 0-95 



Table II. Chemical Analysis. Fine earth dried at 100° C. 



By treatment with Soluble in 1 per cent. 

 stroll}; liydrochloric citric acid 



Sand and insoluble silicates 

 Phosphoric acid ... 

 Potash 



Lime 



Magnesia ... ... 



Loss on ignition (humus, etc.) ... 



Nitrogen 



Lime as carbonate 



"Lime requirement" as CaCOs ... 



The soils of North Wales have been examined by Robinson', and 

 certain of them appear to resemble in many respects those of Scotland. 

 Among other things he found carbonate of lime to be absent from 

 most of the soils examined. This entire absence of carbonate of lime 

 from fertile soils is noteworthy since it has been looked on by many 

 agricultural writers as an essential constituent, and according to Russell'^ 

 "calcium carbonate is often present in small amounts only, but it 

 plavs a controlling part in soil fertility." 



Chemical composition of the soil fractions. 



These preliminary determinations of tiic geiu'ral composition of 

 the soil do not throw mucii light on its history or on the origin of the 

 characteristics which distinguish soils of this type from, for instance, 

 those of the South of England soils which arc also of glacial origin. 



» Journ. of the Board of Agr. 1915. 22. 3. 



^ Soil Conditions and Plant Growth (New Edition), 1915, p. 63. 



