Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam: bridging scales
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| Main Author: | |
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| Format: | Thesis Book |
| Language: | English |
| Published: |
Stuttgart
Univ. Hohenheim, Inst. für Bodenkunde und Standortslehre
2015
|
| Series: | Hohenheimer bodenkundliche Hefte
117 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | IV, 227 S. Ill., graph. Darst. |
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Record in the Search Index
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| adam_text | Titel: Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of No
Autor: Bui, Le Vinh
Jahr: 2015
Table of Contents_i.
1. Introduction.....................................................................................................1
1.1. Problem setting...........................................................................................................1
1.2. Objectives....................................................................................................................2
1.3. Hypotheses...................................................................................................................3
2. Methodology....................................................................................................5
2.1. SOTER approach.......................................................................................................5
2.2. Geo graphic Information System...............................................................................8
2.3. Data collection and derivation...................................................................................9
2.3.1. Secondary data......................................................................................................9
2.3.2. Primary data........................................................................................................10
2.3.3. Derivation of some terrain variables using GIS techniques................................13
2.3.3.1. Generation of main slope positions.................................................................13
2.3.3.2. Generation of curvatures.................................................................................15
2.3.3.3. Generation of slope forms based on the main slope positions........................16
2.3.4. Soil property calculation for Yen Chau...............................................................19
2.3.4.1. Calculation of further physical properties.......................................................19
2.3.4.2. Calculation of further chemical properties......................................................20
2.3.4.3. Criteria for soil quality analysis.......................................................................21
2.4. Soil mapping under fuzzy logic and Soil-Land Inference Model (SoLIM).........22
2.4.1. Limitations of conventional soil mapping under crisp logic and introduction of
fuzzy logic soil mapping....................................................................................................22
2.4.2. Theoretical basis for soil inference using fuzzy logic.........................................25
2.4.2.1. Basic theory.....................................................................................................25
2.4.2.2. Expert system approach...................................................................................25
2.4.2.3. Fuzzy set theory...............................................................................................26
2.4.3. Methodology.......................................................................................................27
2.4.3.1. Knowledge acquisition....................................................................................28
2.4.3.2. Soil-environment key development interview.................................................29
2.4.3.3. Soil-environment description interview..........................................................30
2.4.3.4. Optimality curve definition interview.............................................................31
2.4.3.5. Knowledge verification interview...................................................................32
2.4.3.6. The fuzzy soil inference process.....................................................................32
3. General description of the study area.........................................................34
3.1. Physiography.............................................................................................................34
3.2. Geology......................................................................................................................36
3.3. Climate.......................................................................................................................41
3.4. Soils and Land use....................................................................................................43
3.5. Ethnic groups and land use systems.......................................................................45
ii___Table of Contents_
4. Results............................................................................................................48
4.1. Characterization of the SOTER database of Yen Chau district..........................48
4.1.1. Terrain units........................................................................................................48
4.1.1.1. Characterization of major landforms and terrain units....................................48
4.1.1.2. Determination of terrain units for each of the parent materials.......................50
4.1.2. Terrain components.............................................................................................57
4.1.3 Soil components......................................................................................................59
4.2. Soils and soil properties...........................................................................................65
4.2.1. Overview of soils of Yen Chau...........................................................................65
4.2.2. Major soil properties for soil quality assessment................................................73
4.2.2.1. Air capacity - AC (%).....................................................................................74
4.2.2.2. Available water capacity - AWC (1/m2)..........................................................74
4.2.2.3. Organic matter - OM (kg/m2).........................................................................77
4.2.2.4. Total nitrogen - Nt (kg/m2)..............................................................................77
4.2.2.5. Available phosphorous - Psrayi (g/m2)............................................................78
4.2.2.6. S-value.............................................................................................................79
4.2.2.7. The sum parameter N-P-S...............................................................................79
4.2.2.8. Biological activity............................................................................................81
4.2.2.9. Human impact..................................................................................................82
4.2.3. Computations of correlation coefficients for soil properties...............................83
4.2.4. Major soils and their distribution in Yen Chau...................................................92
4.3. Soil mapping model................................................................................................108
4.3.1. Calibration of the formation of soils in Yen Chau............................................108
4.3.2. Spatial delineation of the soil map of Yen Chau using SoLIM software..........108
4.4. Soil quality mapping model...................................................................................116
5. Discussion.....................................................................................................126
5.1. The Yen Chau SOTER database...........................................................................126
5.2. The variability of Yen Chau soils..........................................................................127
5.2.1. Soil pH (H20)....................................................................................................128
5.2.2. The A-horizon thickness...................................................................................129
5.2.3. Soil organic matter............................................................................................129
5.2.4. Total nitrogen - Nt.............................................................................................131
5.2.5. Base saturation..................................................................................................133
5.2.6. Cation exchange capacity for clay minerals (CECC|ay)......................................135
5.2.7. S-value...............................................................................................................137
5.2.8. Standardized parameter N-P-K.........................................................................138
5.2.9. Soil forming processes to the variability of soils in Yen Chau.........................139
5.2.9.1. Clay illuviation..............................................................................................139
5.2.9.2. Clay formation...............................................................................................141
5.2.9.3. Humus accumulation.....................................................................................142
5.2.9.4. Decalcification...............................................................................................143
___Table of Contents_in_
5.2.9.5. Base leaching.................................................................................................143
5.2.10. Environmental conditions and their role in soil and soil quality mapping........146
5.2.10.1. Climate in association with elevation........................................................146
5.2.10.2. Parent material...........................................................................................147
5.2.10.3. Relief..........................................................................................................150
5.2.10.4. Vegetation..................................................................................................152
5.2.10.5. Biological activity......................................................................................153
5.2.10.6. Human impact............................................................................................154
5.2.10.7. Time...........................................................................................................155
5.3. Validation of the soil and soil quality maps.........................................................157
5.3.1. Validation of the soil map.................................................................................158
5.3.2. Validation of the soil quality map.....................................................................158
6. Conclusions..................................................................................................160
6.1. General conclusions................................................................................................160
6.2. Specific conclusions................................................................................................160
7. Summaries...................................................................................................162
7.1. Summary.................................................................................................................162
7.2. Zusammenfassung..................................................................................................165
7.3. T6m«t.....................................................................................................................168
8. References....................................................................................................171
8.1. Literature................................................................................................................171
8.2. Other information sources.....................................................................................183
9. Appendix......................................................................................................186
9.1. Abbreviations..........................................................................................................186
9.2. Description of reference soil profiles ...................................................................187
9.3. Soil properties calculations for the Yen Chau SOTER database.....................212
Acknowledgement.............................................................................................218
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| illustrated | Illustrated |
| indexdate | 2024-07-10T07:08:26Z |
| institution | BVB |
| language | English |
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| physical | IV, 227 S. Ill., graph. Darst. |
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| spelling | Bui, Le Vinh Verfasser (DE-588)107501980X aut Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam bridging scales Bui Le Vinh Stuttgart Univ. Hohenheim, Inst. für Bodenkunde und Standortslehre 2015 IV, 227 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Hohenheimer bodenkundliche Hefte 117 Zugl.: Hohenheim, Univ., Diss., 2015 Zsfassung in dt. und engl. Sprache Melioration (DE-588)4038544-9 gnd rswk-swf Bodennutzung (DE-588)4007389-0 gnd rswk-swf Nordvietnam (DE-588)4075485-6 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Nordvietnam (DE-588)4075485-6 g Bodennutzung (DE-588)4007389-0 s Melioration (DE-588)4038544-9 s DE-604 Hohenheimer bodenkundliche Hefte 117 (DE-604)BV035362756 117 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028162845&sequence=000004&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Bui, Le Vinh Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam bridging scales Hohenheimer bodenkundliche Hefte Melioration (DE-588)4038544-9 gnd Bodennutzung (DE-588)4007389-0 gnd |
| subject_GND | (DE-588)4038544-9 (DE-588)4007389-0 (DE-588)4075485-6 (DE-588)4113937-9 |
| title | Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam bridging scales |
| title_auth | Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam bridging scales |
| title_exact_search | Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam bridging scales |
| title_full | Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam bridging scales Bui Le Vinh |
| title_fullStr | Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam bridging scales Bui Le Vinh |
| title_full_unstemmed | Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam bridging scales Bui Le Vinh |
| title_short | Towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of Northern Vietnam |
| title_sort | towards sustainability of land use in a highly vulnerable and degraded tropical soil landscape of northern vietnam bridging scales |
| title_sub | bridging scales |
| topic | Melioration (DE-588)4038544-9 gnd Bodennutzung (DE-588)4007389-0 gnd |
| topic_facet | Melioration Bodennutzung Nordvietnam Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028162845&sequence=000004&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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| work_keys_str_mv | AT builevinh towardssustainabilityoflanduseinahighlyvulnerableanddegradedtropicalsoillandscapeofnorthernvietnambridgingscales |