Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 418971
Title Integrating Environmental and in situ Hyperspectral Remote Sensing Variables for Grass Nitrogen Estimation in Savannah Ecosystems
Author(s) Ramoelo, A.; Cho, M.A.; Mathieu, R.; Skidmore, A.K.; Schlerf, M.; Heitkonig, I.M.A.; Prins, H.H.T.
Event 34th ISRSE on The GEOSS Era : Towards Operational Environmental Monitoring, Sydney, Australia, 2011-04-10/2011-04-15
Department(s) Resource Ecology
PE&RC
Publication type Contribution in proceedings
Publication year 2011
Abstract Information about the distribution of grass nitrogen (N) concentration is crucial in understanding rangeland vitality and facilitates effective management of wildlife and livestock. A challenge in estimating grass N concentration using remote sensing in savannah ecosystems is that these areas are characterised by heterogeneity in edaphic, topographic and climatic factors. The objective is to test the utility of integrating environmental variables and in situ hyperspectral remote sensing variables for predicting grass N concentration along a land use gradient in the greater Kruger National Park. Data used include i) environmental variables, ii) measured grass N concentration and iii) in situ measured hyperspectral spectra. Non-linear partial least square regression was used. Results showed that several environmental variables were important for N estimation. Integrating environmental variables with in situ hyperspectral variables increased grass N estimation accuracy. The study demonstrated the importance of integrated modelling for savannah ecosystem state assessment.
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