Seasonal morphological changes of pore volume in a Hapludand with different types of agriculture utilization

In a Hapludand of south central Chile, used after clearing the native forest at different periods and with different pasture managements, seasonal volumetric changes in pore morphology of undisturbed samples were determined in profiles. A small increase in pore volume was observed from winter to sum...

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Bibliographic Details
Published inAgro sur Vol. 22; no. 1
Main Authors Ellies, Achim, Ramirez, C, Figueroa, S. (Universidad Austral de Chile, Valdivia (Chile). Fac. de Ciencias Agrarias)
Format Journal Article
LanguageSpanish
Published 01.06.1994
Subjects
CHILE
CHILI
COMPACTACION DEL SUELO
COMPACTAGE DU SOL
ESTRUCTURA DEL SUELO
GENERO HUMANO
GENRE HUMAIN
IMPACT SUR L'ENVIRONNEMENT
IMPACTO AMBIENTAL
SOL D'HERBAGES
SOL VOLCANIQUE
STRUCTURE DU SOL
SUELO DE PRADERAS
SUELO VOLCANICO
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Summary:In a Hapludand of south central Chile, used after clearing the native forest at different periods and with different pasture managements, seasonal volumetric changes in pore morphology of undisturbed samples were determined in profiles. A small increase in pore volume was observed from winter to summer. The qualitative changes of pore volume depend more on the management than on time of use after clearing. Morphological changes show on all sites a decrease of large pores and an increase of the fine ones. In the places were soil was removed by clearing or by soil cultivation, seasonal changes were translocated to deeper soil layers. With pasture management for a long period of time after clearing, morphological changes of pore space were observed principally in the upper layers. With a dense grass cover modifications of pore volume correspond to an increase or decrease of neighboring fraction. In opposition, with sparse covers the changes are contrasting in pore size fractions
Bibliography:P33
9500095
ISSN:0304-8802