Details
| Original language | English |
|---|---|
| Pages (from-to) | 818-831 |
| Number of pages | 14 |
| Journal | Journal of Soil Science and Plant Nutrition |
| Volume | 16 |
| Issue number | 3 |
| Publication status | Published - Sept 2016 |
Abstract
Different physical properties of volcanic ash soils were investigated along a transect of 120 km from the western slope of the Central Cordilleras (40°20’S, 72°06’W) to the eastern slope of the Costal Cordillera (39°39’S, 73°11’W) in southern Chile with respect to the degree of soil development (Arenosol versus Andosol stage; Arenosol: young volcanic ash soil, free of clay, tephric properties, Andosol: older volcanic soil, clayey). The Andosols show a higher total pore volume and a higher field capacity, especially due to an increase in fine pores, than the Arenosols. Furthermore, the precompression stress (Pc) as a parameter for the mechanical soil strength is higher for Andosols despite of a lower bulk density. A land use (cropland, meadow, forest) dependent variation of the investigated parameters was less distinct for Andosols. A reduction of macropores and saturated hydraulic conductivity (ks) due to agriculture could be determined in the field, but in general the values are still on a high level with ks-values >100 cm d-1. However, at higher stresses using an oedometer test the ks-values of the Andosols are highly negatively affected with values <10 cm d-1. Aggregation is of major importance for soil stability of Andosols, whereas a homogenization of soil structure will lead to a distinct decrease of Pc of approx. 50%.
Keywords
- Andosol, Arenosol, Hydraulic conductivity, Precompression stress, Stress strain behavior
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
- Agricultural and Biological Sciences(all)
- Soil Science
- Agricultural and Biological Sciences(all)
- Plant Science
Sustainable Development Goals
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In: Journal of Soil Science and Plant Nutrition, Vol. 16, No. 3, 09.2016, p. 818-831.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Land use and soil development in Southern chile
T2 - Effects on physical properties
AU - Fleige, H.
AU - Beck-Broichsitter, S.
AU - Dörner, J.
AU - Goebel, M. O.
AU - Bachmann, J.
AU - Horn, R.
N1 - Funding Information: This project between Chile and Germany was funded by the German Research Foundation (DFG) (HO 911/45-1, BA 1359/12-1). Dr. Jos? D?rner also thanks the Alexander von Humboldt Foundation for the research stay at the Christian Albrechts University of Kiel (Georg Foster Fellowship for Experienced Researchers). We wish to thank Prof. Dr. M.B. Kirkham (Kansas State University) for valuable discussions and for linguistic review of the paper.
PY - 2016/9
Y1 - 2016/9
N2 - Different physical properties of volcanic ash soils were investigated along a transect of 120 km from the western slope of the Central Cordilleras (40°20’S, 72°06’W) to the eastern slope of the Costal Cordillera (39°39’S, 73°11’W) in southern Chile with respect to the degree of soil development (Arenosol versus Andosol stage; Arenosol: young volcanic ash soil, free of clay, tephric properties, Andosol: older volcanic soil, clayey). The Andosols show a higher total pore volume and a higher field capacity, especially due to an increase in fine pores, than the Arenosols. Furthermore, the precompression stress (Pc) as a parameter for the mechanical soil strength is higher for Andosols despite of a lower bulk density. A land use (cropland, meadow, forest) dependent variation of the investigated parameters was less distinct for Andosols. A reduction of macropores and saturated hydraulic conductivity (ks) due to agriculture could be determined in the field, but in general the values are still on a high level with ks-values >100 cm d-1. However, at higher stresses using an oedometer test the ks-values of the Andosols are highly negatively affected with values <10 cm d-1. Aggregation is of major importance for soil stability of Andosols, whereas a homogenization of soil structure will lead to a distinct decrease of Pc of approx. 50%.
AB - Different physical properties of volcanic ash soils were investigated along a transect of 120 km from the western slope of the Central Cordilleras (40°20’S, 72°06’W) to the eastern slope of the Costal Cordillera (39°39’S, 73°11’W) in southern Chile with respect to the degree of soil development (Arenosol versus Andosol stage; Arenosol: young volcanic ash soil, free of clay, tephric properties, Andosol: older volcanic soil, clayey). The Andosols show a higher total pore volume and a higher field capacity, especially due to an increase in fine pores, than the Arenosols. Furthermore, the precompression stress (Pc) as a parameter for the mechanical soil strength is higher for Andosols despite of a lower bulk density. A land use (cropland, meadow, forest) dependent variation of the investigated parameters was less distinct for Andosols. A reduction of macropores and saturated hydraulic conductivity (ks) due to agriculture could be determined in the field, but in general the values are still on a high level with ks-values >100 cm d-1. However, at higher stresses using an oedometer test the ks-values of the Andosols are highly negatively affected with values <10 cm d-1. Aggregation is of major importance for soil stability of Andosols, whereas a homogenization of soil structure will lead to a distinct decrease of Pc of approx. 50%.
KW - Andosol
KW - Arenosol
KW - Hydraulic conductivity
KW - Precompression stress
KW - Stress strain behavior
UR - http://www.scopus.com/inward/record.url?scp=85008970607&partnerID=8YFLogxK
U2 - 10.4067/S0718-95162016005000058
DO - 10.4067/S0718-95162016005000058
M3 - Article
AN - SCOPUS:85008970607
VL - 16
SP - 818
EP - 831
JO - Journal of Soil Science and Plant Nutrition
JF - Journal of Soil Science and Plant Nutrition
SN - 0718-9516
IS - 3
ER -