The Analysis of Spatial and Temporal Trends in Yield Map Data over Six Years |
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| Authors: | Simon Blackmore Richard J Godwin Spyros Fountas |
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| Institution: | 1 AgroTechnology, The Royal Veterinary and Agricultural University, Agrovej 10 Bulding 8-51, Taastrup 2630, Denmark; e-mail address of corresponding author: simon.blackmore@kvl.dk;2 National Soils Resources Institute, Cranfield University at Silsoe, UK; r.godwin@cranfield.ac.uk |
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| Abstract: | A quantitative analysis of yield data from four fields over 6 years was carried out to identify the spatial and temporal trends. The methodology was modified from previous work to separate the temporal effects into two parts; the inter-year offset and the temporal variance. The inter-year offset quantifies the overall differences in yield between 1 year and the next, whereas the temporal variance indicates the amount of change at a particular point over time. Results from these fields show that the significant spatial variability found within each individual yield map cancelled out over time, leaving a relatively homogenous spatial trend map. The implications of these findings are that each field should be managed according to the current years’ conditions. |
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