Pre-compaction as tool to improve water/air relationship in soil reclamation after subsurface sand strata extraction
In order to reclaim a disturbed Inceptisol (1 m depth, sandy loam) after subsurface sand extraction, pre-compaction labours with different water contents were made, to assess the impact of this management on some soil physical properties. Randomized field plots (20 m2) were used to achieve three increasing pre-compaction levels (T1, T2 and T3) and a control without compaction (T0), considering four replicates. A pea crop (Pisum sativum L.) was established as biological indicator. Bulk density, water content, pre-compaction by Proctor test (laboratory and field), infiltration rate and resistance to penetration were measured in the soil, while dry matter was measured in the crop. Soil bulk density values ranged between 1.25 Mg m-3 for T0 and 1.49 Mg m-3 for T3, the higher precompaction treatment. Field Proctor test showed results similar to those found in the laboratory assessment, with a parabolic adjustment pattern. Soil resistance to penetration reached maximum values fluctuating between 180 and 280 kPa, concentrating in the surface and dissipating below 30 cm depth. Increased water storage was generated by pre-compaction treatments, although T3 promoted a significantly lower infiltration rate. The best crop yield was observed in T2, with a bulk density of 1.41 Mg m-3, showing the best water/air/ resistance relation which resulted in a higher crop yield.
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Facultad de Ciencias Agrarias. Universidad Austral de Chile
2014
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rev-agrosur-cl-article-41042019-09-04T14:24:46Z Pre-compaction as tool to improve water/air relationship in soil reclamation after subsurface sand strata extraction Pre-compactación como herramienta para mejorar la relación agua/aire en habilitación de suelos post-extracción de áridos Seguel, O. Cárcamo, I. Casanova, M. Homer, I. Haberland, J. Benavides, C. Pre-compactación Test de Próctor densidad aparente porosidad resistencia mecánica Pre-compaction Proctor test Bulk density Porosity Mechanical strength In order to reclaim a disturbed Inceptisol (1 m depth, sandy loam) after subsurface sand extraction, pre-compaction labours with different water contents were made, to assess the impact of this management on some soil physical properties. Randomized field plots (20 m2) were used to achieve three increasing pre-compaction levels (T1, T2 and T3) and a control without compaction (T0), considering four replicates. A pea crop (Pisum sativum L.) was established as biological indicator. Bulk density, water content, pre-compaction by Proctor test (laboratory and field), infiltration rate and resistance to penetration were measured in the soil, while dry matter was measured in the crop. Soil bulk density values ranged between 1.25 Mg m-3 for T0 and 1.49 Mg m-3 for T3, the higher precompaction treatment. Field Proctor test showed results similar to those found in the laboratory assessment, with a parabolic adjustment pattern. Soil resistance to penetration reached maximum values fluctuating between 180 and 280 kPa, concentrating in the surface and dissipating below 30 cm depth. Increased water storage was generated by pre-compaction treatments, although T3 promoted a significantly lower infiltration rate. The best crop yield was observed in T2, with a bulk density of 1.41 Mg m-3, showing the best water/air/ resistance relation which resulted in a higher crop yield. Con el objeto de recuperar un suelo agrícola franco arenoso disturbado por la extracción de estratas de arenas subsuperficiales, se realizó una labor de pre-compactación con distinto contenido de agua, para evaluar el efecto sobre algunas propiedades físicas del suelo. Se utilizaron parcelas de 20 m2 distribuidas al azar, dentro de las cuales se lograron generar tres niveles de pre-compactación con rodillo (T1, T2 y T3), más un testigo (T0) sin compactar, todas con cuatro repeticiones. Se utilizó un cultivo de arveja (Pisum sativum L.) como indicador. En el suelo se midió la densidad aparente, el contenido de agua, la pre-compactación con el Test de Próctor, la velocidad de infiltración y la resistencia a la penetración; en el cultivo se midió el rendimiento en materia seca. Los valores de densidad aparente variaron entre 1,25 Mg m-3 para el testigo (T0) y 1,49 Mg m-3 para el tratamiento de mayor compactación (T3). La pre-compactación en campo presentó un comportamiento similar al obtenido con el Test de Próctor, con un ajuste parabólico. La resistencia a la penetración alcanzó valores máximos que fluctuaron entre los 180 y 280 kPa, concentrándose en los 30 cm superficiales y disipándose en profundidad. Los tratamientos de pre-compactación generaron un aumento en el almacenamiento de agua, aunque en T3 generó la menor tasa de infiltración. La mejor condición se alcanzó en el tratamiento T2, con una densidad aparente de 1,41 Mg m-3, logrando la mejor condición en la relación agua/aire/resistencia, traduciéndose en los mayores rendimientos de materia seca. Facultad de Ciencias Agrarias. Universidad Austral de Chile 2014-04-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://revistas.uach.cl/index.php/agrosur/article/view/4104 10.4206/agrosur.2014.v42n1-06 Agro sur; Vol. 42 Núm. 1 (2014); 51-62 0719-4196 0304-8802 spa http://revistas.uach.cl/index.php/agrosur/article/view/4104/5155 Derechos de autor 2014 Agro sur |
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| author |
Seguel, O. Cárcamo, I. Casanova, M. Homer, I. Haberland, J. Benavides, C. |
| spellingShingle |
Seguel, O. Cárcamo, I. Casanova, M. Homer, I. Haberland, J. Benavides, C. Pre-compaction as tool to improve water/air relationship in soil reclamation after subsurface sand strata extraction |
| author_facet |
Seguel, O. Cárcamo, I. Casanova, M. Homer, I. Haberland, J. Benavides, C. |
| author_sort |
Seguel, O. |
| title |
Pre-compaction as tool to improve water/air relationship in soil reclamation after subsurface sand strata extraction |
| title_short |
Pre-compaction as tool to improve water/air relationship in soil reclamation after subsurface sand strata extraction |
| title_full |
Pre-compaction as tool to improve water/air relationship in soil reclamation after subsurface sand strata extraction |
| title_fullStr |
Pre-compaction as tool to improve water/air relationship in soil reclamation after subsurface sand strata extraction |
| title_full_unstemmed |
Pre-compaction as tool to improve water/air relationship in soil reclamation after subsurface sand strata extraction |
| title_sort |
pre-compaction as tool to improve water/air relationship in soil reclamation after subsurface sand strata extraction |
| description |
In order to reclaim a disturbed Inceptisol (1 m depth, sandy loam) after subsurface sand extraction, pre-compaction labours with different water contents were made, to assess the impact of this management on some soil physical properties. Randomized field plots (20 m2) were used to achieve three increasing pre-compaction levels (T1, T2 and T3) and a control without compaction (T0), considering four replicates. A pea crop (Pisum sativum L.) was established as biological indicator. Bulk density, water content, pre-compaction by Proctor test (laboratory and field), infiltration rate and resistance to penetration were measured in the soil, while dry matter was measured in the crop. Soil bulk density values ranged between 1.25 Mg m-3 for T0 and 1.49 Mg m-3 for T3, the higher precompaction treatment. Field Proctor test showed results similar to those found in the laboratory assessment, with a parabolic adjustment pattern. Soil resistance to penetration reached maximum values fluctuating between 180 and 280 kPa, concentrating in the surface and dissipating below 30 cm depth. Increased water storage was generated by pre-compaction treatments, although T3 promoted a significantly lower infiltration rate. The best crop yield was observed in T2, with a bulk density of 1.41 Mg m-3, showing the best water/air/ resistance relation which resulted in a higher crop yield. |
| publisher |
Facultad de Ciencias Agrarias. Universidad Austral de Chile |
| publishDate |
2014 |
| url |
http://revistas.uach.cl/index.php/agrosur/article/view/4104 |
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