[en] FAO’s water-driven crop growth simulation model, AquaCrop, was calibrated and validated for cassava (Manihot esculenta Crantz). Existing datasets, used in similar published works, were shared covering several years and regions (Colombia, Nigeria and Togo). Different varieties were tested for the case of Colombia and a single variety (TME-419) for Nigeria and Togo. Overall calibrated biomass simulations resulted in an R² of 0.96 and a RMSE of 1.99 tonne DM/ha. As for dry tuber yield estimates, it was not possible to find a single harvest index for the ensembled varieties given their varying characteristics and limited data per variety. However, for the TME-419 variety (Nigeria and Togo) calibrated root tuber simulations yielded and R² of 0.94 and a RMSE of 2.37 tonne DM/ha. A single crop-file was developed for different cassava varieties and agro-ecological regions, which can be applied with confidence to further study cassava related food security, water productivity, improved agronomic practices, etc.
Disciplines :
Agriculture & agronomy
Author, co-author :
Wellens, Joost ; Université de Liège - ULiège > Département GxABT > Eau, Environnement, Développement
Raes, Dirk; KU Leuven University > Department of Earth and Environmental Sciences
Fereres, Elias; University of Cordoba > Department of Agronomy
Diels, Jan; KU Leuven University > Department of Earth and Environmental Sciences
Coppye, Cecilia; KU Leuven University > Department of Earth and Environmental Sciences
Adiele, Joy Geraldine; National Root Crops Research Institute
Ezui, Kodjovi Senam Guillaume; African Plant Nutrition Institute
Becerra, Luis-Augusto; International Center for Tropical Agriculture
Selvarai, Michael Gomez; International Center for Tropical Agriculture
Dercon, Gerd; Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture
Heng, Lee Kheng; Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture
Language :
English
Title :
Calibration and validation of the AquaCrop water productivity model for cassava (Manihot esculenta Crantz)
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