V. 



THE ANALYSIS AND COMPOSITION OF SOILS 



101 



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poverty of Transvaal soils in nitrogen, phosphorus pentoxide and lime. 

 English soils contain, as a rule, from O15 to 0'30 per cent of nitrogen, 

 and from 0*1 to - 25 per cent of phosphorus pentoxide, while, in most 

 cases, Transvaal soils contain less than 0'15 and often less than 0'08 



