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 545448
Title Using model predictions of soil carbon in farm-scale auditing - A software tool
Author(s) Gruijter, J.J. de; Wheeler, I.; Malone, B.P.
Source Agricultural Systems 169 (2019). - ISSN 0308-521X - p. 24 - 30.
DOI https://doi.org/10.1016/j.agsy.2018.11.007
Department(s) Unit Beheer - Alterra
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Julia - Map uncertainty - Prediction error - Soil carbon auditing - Stratified random sampling - Value of information
Abstract

We introduce a software tool for optimal sampling design in the context of farm-scale soil carbon auditing, where the amount of sequestered soil carbon will be estimated from a random sample. Existing tools do not use available ancillary information, or do not have the functionality needed for farm-scale soil carbon auditing. Using a grid of predicted carbon content with associated uncertainty, the software optimises a stratified random sampling design, such that the profit is maximised on the basis of sequestered carbon price, sampling costs, and a trading parameter that balances farmer's and buyer's risks due to uncertainty of the estimated amount of sequestered carbon. As the algorithm is computationally intensive, the package is written in Julia for speed. From a case study we conclude that our software is an effective tool for farm-scale soil carbon auditing, and that it outperforms the existing tools in terms of efficiency and functionality.

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