Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/50746
Full metadata record
DC FieldValueLanguage
dc.contributor.authorGerhard Clemensen_US
dc.contributor.authorSabine Fiedleren_US
dc.contributor.authorNguyen Dinh Congen_US
dc.contributor.authorNyuyen Van Dungen_US
dc.contributor.authorUlrich Schuleren_US
dc.contributor.authorKarl Stahren_US
dc.date.accessioned2018-09-04T04:45:02Z-
dc.date.available2018-09-04T04:45:02Z-
dc.date.issued2010-05-15en_US
dc.identifier.issn03418162en_US
dc.identifier.other2-s2.0-77950691396en_US
dc.identifier.other10.1016/j.catena.2010.01.006en_US
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77950691396&origin=inwarden_US
dc.identifier.urihttp://cmuir.cmu.ac.th/jspui/handle/6653943832/50746-
dc.description.abstractIn Vietnam as much as half of the total land area is already degraded by soil erosion and nutrient depletion. In particular, degradation due to deforestation is increasingly affecting mountainous areas in north-western Vietnam. The necessity to safeguard the farmers' livelihoods requires sustainable resource management, which firstly requires a qualitative and quantitative evaluation of resources. The objectives of the present study were to (1) identify the dominant soil types and their vulnerability using elicitation of local soil knowledge, (2) characterise the physical and chemical properties of the soils and (3) link them to the relief position and land use in order to (4) initiate sustainable soil use based on recommendations deduced from objectives (1) to (3). These objectives were achieved also by the elicitation of local knowledge. The final aim of the study was to initiate sustainable soil use based on recommendations for sustainable land use scenarios. The Chieng Khoi commune in Son La province of northern Vietnam was chosen as representative for other erosion-prone Southeast Asian sloping areas. In a participatory approach, combining local and scientific knowledge, sixteen sites were selected, representative for distinct relief positions, parent material (sand stone and silt stone), land use history, and erosion hazard. Chemical (e.g. content of organic matter, nitrogen, cation exchange capacity, base saturation, and plant available phosphorous) and physical properties (e.g. air capacity, plant available water) were used to estimate soil fertility. The predominant reference soil groups in the study area are Alisols and Luvisols, with a high diversity in respect to soil fertility. These soils are locally named 'red soil' and 'black soil', respectively. Although the main physical processes are erosion and selective sedimentation, farmers tend to underestimate their impact and causes, whereas soil quality was well-evaluated. Soils with high fertility were found on less eroded upper parts of hills and at sites, where agricultural use started only recently. Once degraded by cultivation practices, soils derived from sandstone did not recover even after more than 50 years of fallow. As a result of unsustainable land use, soils on middle and lower slopes are often affected by severe soil erosion, whereas foot slope soils suffer from accumulation of eroded infertile subsoil material as well as stagnic conditions. This study showed that unsustainable land use at upslope landscape positions has a severe impact on downslope areas. The elicitation of local knowledge facilitated the identification of such hot spots, allowing the implementation of spatially targeted conservation measures. © 2010 Elsevier B.V. All rights reserved.en_US
dc.subjectEarth and Planetary Sciencesen_US
dc.titleSoil fertility affected by land use history, relief position, and parent material under a tropical climate in NW-Vietnamen_US
dc.typeJournalen_US
article.title.sourcetitleCatenaen_US
article.volume81en_US
article.stream.affiliationsHanoi Pedagogical University 2en_US
article.stream.affiliationsUniversitat Hohenheimen_US
article.stream.affiliationsHanoi Universityen_US
article.stream.affiliationsChiang Mai Universityen_US
Appears in Collections:CMUL: Journal Articles

Files in This Item:
There are no files associated with this item.


Items in CMUIR are protected by copyright, with all rights reserved, unless otherwise indicated.