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Handling Data Gaps in Reported Field Measurements of Short Rotation Forestry

Chair of Soil Protection and Recultivation, Institute of Environmental Sciences, Brandenburg University of Technology Cottbus–Senftenberg, Konrad-Wachsmann-Allee 6, 03046 Cottbus, Germany
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Data 2019, 4(4), 132; https://doi.org/10.3390/data4040132
Received: 30 June 2019 / Revised: 8 September 2019 / Accepted: 23 September 2019 / Published: 25 September 2019
(This article belongs to the Special Issue Forest Monitoring Systems and Assessments at Multiple Scales)
Filling missing data in forest research is paramount for the analysis of primary data, forest statistics, land use strategies, as well as for the calibration/validation of forest growth models. Consequently, our main objective was to investigate several methods of filling missing data under a reduced sample size. From a complete dataset containing yearly first-rotation tree growth measurements over a period of eight years, we gradually retrieved two and then four years of measurements, hence operating on 72% and 43% of the original data. Secondly, 15 statistical models, five forest growth functions, and one biophysical, process-oriented, tree growth model were employed for filling these data gap representations accounting for 72% and 43% of the available data. Several models belonging to (i) regression analysis, (ii) statistical imputation, (iii) forest growth functions, and (iv) tree growth models were applied in order to retrieve information about the trees from existing yearly measurements. Subsequently, the findings of this study could lead to finding a handy tool for both researchers and practitioners dealing with incomplete datasets. Moreover, we underline the paramount demand for far-sighted, long-term research projects for the expansion and maintenance of a short rotation forestry (SRF) repository. View Full-Text
Keywords: missingness; data gap; statistics; amelia; yield-safe missingness; data gap; statistics; amelia; yield-safe
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Seserman, D.-M.; Freese, D. Handling Data Gaps in Reported Field Measurements of Short Rotation Forestry. Data 2019, 4, 132.

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