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A zone-based approach for processing and interpreting variability in multi-temporal yield data sets

Lookup NU author(s): Dr James Taylor

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


Abstract

The availability of combine yield monitors since the early 1990′s means that long time-series (10+ years) of yield data are now available in many arable production systems. Despite this, yield data and maps are still under-exploited and under-valued by professionals in the agricultural sector. These historical data need to be better considered and analyzed because they are the only audited means by which growers and practitioners can assess the spatio-temporal yield response within a field. When done, time-series of yield maps are mostly processed by classification-based algorithms to generate spatial and temporal yield stability maps or to provide yield or management classes. This work details an alternate segmentation-based methodology to first generate and then characterize contiguous within-field yield zones from historical yield data. It operates on the yield data rather than interpolated yield maps. A seeded region growing algorithm is proposed that enables both the specification of seeds and zone segmentation in a multivariate (multi-temporal yield) attribute space. Novel metrics to assess the yield zoning are proposed that are derived from textural image analysis. The zoning algorithm and metrics were applied to two fields with long time-series (6+ years) of yield data in combinable crops. The two case studies showed that the proposed zone-based approach was effective in delimitating relevant within-field yield zones. The generated zones had differing temporal yield responses between neighbouring zones that were of agronomic significant and interest to the production systems. As this is a first attempt to apply a segmentation algorithm to yield data, areas for future development applications are also proposed.


Publication metadata

Author(s): Leroux C, Jones H, Taylor J, Clenet A, Tisseyre B

Publication type: Article

Publication status: Published

Journal: Computers and Electronics in Agriculture

Year: 2018

Volume: 148

Pages: 299-308

Print publication date: 01/05/2018

Online publication date: 30/03/2018

Acceptance date: 22/03/2018

Date deposited: 31/03/2018

ISSN (print): 0168-1699

ISSN (electronic): 1872-7107

Publisher: Elsevier

URL: https://doi.org/10.1016/j.compag.2018.03.029

DOI: 10.1016/j.compag.2018.03.029


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