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Studies in tropical soils: IV. Organic transformations in soils, composts and peat

Published online by Cambridge University Press:  27 March 2009

D. W. Duthie
D. W. Duthie
Affiliation:
Imperial College of Tropical Agriculture, Trinidad, British West Indies
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Extract

1. Waksman's simplified scheme of fractionation was used in attempts to trace the organic transformations occurring in some tropical samples of composts, soils and peats.

2. It was found that a useful partition of the nitrogenous substances into hydrolysable and resistant fractions could be effected by boiling with 5 per cent sulphuric acid for 6 hours.

3. Two profile layers of a black calcareous Trinidadian clay soil were compared with two horizons of a prairie soil examined by Waksman & Stevens. The surface layers of both soils were found to be similar in chemical characters, but the lower subsoil layers of the Trinidadian soil gave evidence of a more advanced and profound degree of organic decomposition.

4. Serial soil samples, taken from eight undisturbed natural profiles representative of humid tropical soil types occurring in Jamaica and Trinidad, were similarly examined.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 27 , Issue 2 , April 1937 , pp. 162 - 177
Copyright
Copyright © Cambridge University Press 1937

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References

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