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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Published in | Agro sur Vol. 22; no. 1 |
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Main Authors | , , |
Format | Journal Article |
Language | Spanish |
Published |
01.06.1994
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Subjects | |
Online Access | Get more information |
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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 |
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Bibliography: | P33 9500095 |
ISSN: | 0304-8802 |