the sa.mo aj^e, gruwai on tlie talc-areoiis and noncalcareous soils, are 

 given in Tabic I. 



Table I. — Ash analyses by FIlclic and Grandcau of trees from calcareous an/1 siliceous soils. 



They concluded that the maritime ]iiiic and chestnut on the cal- 

 careous soils absorbed an undue amount of lime, which caused a dim- 

 inution m the other elements, notably in potash and iron; the increase 

 in lime and diminution in potash and iron caused the poor growth of 

 these trees on the calcareous soils. They further state that tlie 

 presence of an excess of hme in the soil appears to be always un- 

 favorable to the absorption of iron. It will be noticed that the bean 

 tree, which grew equally well on the two soils, showed practically the 

 same content of lime, potash, and iron in the ash when grown on the 

 calcareous as when grown on the siliceous soil. 



Wolff reports analyses by ZoUer, Kochlin, and Rothe of barley 

 seeds, madder roots, and bugle weed from low-Ume and calcareous 

 soils.' Unfortunately the comparative growths of the plants on 

 the two classes of soil are not given, so the results are not particularly 

 illuminating for our purpose. Nor is it e\ndent that the comparative 

 samples of plants were grown under like climatic concUtions. The 

 barley seeds were grown on soils containing 1.55 per cent and 23.04 

 per cent of CaCOj, but there was no difference in the ash content 

 and ash composition of the seeds from the two soils. The madder 

 roots from the calcareous soils contained one-third as much FejOg, 

 CI2, and SiOj and one-half more SO3 than the roots from the low- 

 lime soil. The bugle weed (Ajuga reptans) was grown on soils con- 

 taining 0.14 per cent of CaO and 37.16 per cent of CaCOg. The 

 plants grown on the calcareous soil differed from those grown on 

 the low-Ume soil in containing twice as much magnesia and chlorin, 

 one-third as much silica, and one-fourth as much soda. 



1 Wolfl, E. Aschen-analysen. Berlin, 1.871, pp. IS, 116, 138. 



