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Nikolaus J. Kuhn   Professor  Other 
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Nikolaus J. Kuhn published an article in June 2018.
Top co-authors See all
Nikolaus J. Kuhn

73 shared publications

Physical Geography & Environmental Change Research Group, Department of Environmental Sciences, University of Basel, Basel, Switzerland

Rorke B. Bryan

37 shared publications

Faculty of Forestry, University of Toronto, 33 Willcocks Street, Toronto, M5S 3B3, ON, Canada

Yuxia Li

37 shared publications

Key Laboratory for Robot & Intelligent Technology of Shandong Province, Shandong University of Science and Technology, Qingdao, China

Peter Scarth

36 shared publications

Joint Remote Sensing Research Program, School of Geography, Planning and Environmental Management, University of Queensland, St Lucia, QLD 4072, Australia

K. M. Rowntree

23 shared publications

Rhodes University

73
Publications
36
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182
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Publication Record
Distribution of Articles published per year 
(2002 - 2018)
Total number of journals
published in
 
21
 
Publications See all
Article 1 Read 1 Citation The invasive alien plant, Impatiens glandulifera (Himalayan Balsam), and increased soil erosion: causation or associatio... Philip Greenwood, Patrick Baumann, Simon Pulley, Nikolaus J.... Published: 04 June 2018
Journal of Soils and Sediments, doi: 10.1007/s11368-018-2041-0
DOI See at publisher website
Article 0 Reads 0 Citations Local soil quality assessment of north-central Namibia: integrating farmers' and technical knowledge Brice Prudat, Lena Bloemertz, Nikolaus J. Kuhn Published: 07 February 2018
SOIL, doi: 10.5194/soil-4-47-2018
DOI See at publisher website ABS Show/hide abstract
Soil degradation is a major threat for farmers of semi-arid north-central Namibia. Soil conservation practices can be promoted by the development of soil quality (SQ) evaluation toolboxes that provide ways to evaluate soil degradation. However, such toolboxes must be adapted to local conditions to reach farmers. Based on qualitative (interviews and soil descriptions) and quantitative (laboratory analyses) data, we developed a set of SQ indicators relevant for our study area that integrates farmers' field experiences (FFEs) and technical knowledge. We suggest using participatory mapping to delineate soil units (Oshikwanyama soil units, KwSUs) based on FFEs, which highlight mostly soil properties that integrate long-term productivity and soil hydrological characteristics (i.e. internal SQ). The actual SQ evaluation of a location depends on the KwSU described and is thereafter assessed by field soil texture (i.e. chemical fertility potential) and by soil colour shade (i.e. SOC status). This three-level information aims to reveal SQ improvement potential by comparing, for any location, (a) estimated clay content against median clay content (specific to KwSU) and (b) soil organic status against calculated optimal values (depends on clay content). The combination of farmers' and technical assessment cumulates advantages of both systems of knowledge, namely the integrated long-term knowledge of the farmers and a short- and medium-term SQ status assessment. The toolbox is a suggestion for evaluating SQ and aims to help farmers, rural development planners and researchers from all fields of studies understanding SQ issues in north-central Namibia. This suggested SQ toolbox is adapted to a restricted area of north-central Namibia, but similar tools could be developed in most areas where small-scale agriculture prevails.
Article 4 Reads 0 Citations Bequest of the Norseman—The Potential for Agricultural Intensification and Expansion in Southern Greenland under Climate... Chatrina Caviezel, Matthias Hunziker, Nikolaus J. Kuhn Published: 07 December 2017
Land, doi: 10.3390/land6040087
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The increase of summer temperatures and a prolonged growing season increase the potential for agricultural land use for subarctic agriculture. Nevertheless, land use at borderline ecotones is influenced by more factors than temperature and the length of the growing season, for example soil quality, as the increasing lengths of dry periods during vegetation season can diminish land use potential. Hence, this study focuses on the quality of the soil resource as possible limiting factor for land use intensification in southern Greenland. Physical and chemical soil properties of cultivated grasslands, reference sites and semi-natural birch and grassland sites were examined to develop a soil quality index and to identify the suitability of soils for a sustainable intensification and expansion of the agriculture. The study revealed that soils in the study area are generally characterized by a low effective cation exchange capacity (CECeff) (3.7 ± 5.0 meq 100 g−1), low pH CaCl2 (4.6 ± 0.4) and low clay and silt content (3.0 ± 1.0% and 38.2 ± 4.7%, respectively). Due to the high amount of coarse fraction (59.1 ± 5.8%) and the low amount of soil nutrients, an increasing threat of dry spells for soils and yield could be identified. Further, future land use intensification and expansion bears a high risk for concomitant effects, namely further soil acidification, nutrient leaching and soil degradation processes. However, results of the soil quality index also indicate that sites which were already used by the Norseman (980s–1450) show the best suitability for agricultural use. Thus, these areas offer a possibility to expand agricultural land use in southern Greenland.
Article 2 Reads 0 Citations Green alder encroachment in the European Alps: The need for analyzing the spread of a native-invasive species across spa... Chatrina Caviezel, Matthias Hunziker, Nikolaus J. Kuhn Published: 01 December 2017
CATENA, doi: 10.1016/j.catena.2017.08.006
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Article 4 Reads 0 Citations Estimating aboveground woody biomass change in Kalahari woodland: combining field, radar, and optical data sets Vladimir R. Wingate, Stuart R Phinn, Nikolaus Kuhn, Peter Sc... Published: 16 October 2017
International Journal of Remote Sensing, doi: 10.1080/01431161.2017.1390271
DOI See at publisher website
Article 6 Reads 0 Citations Shrub encroachment by green alder on subalpine pastures: Changes in mineral soil organic carbon characteristics Matthias Hunziker, Chatrina Caviezel, Nikolaus J. Kuhn Published: 01 October 2017
CATENA, doi: 10.1016/j.catena.2017.05.005
DOI See at publisher website
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