Abstract
A study validating the CERES-wheat and the AFRC-wheat crop models was performed on Swedish (cv. Polkka) and German (cv. Nandu) spring wheat (Triticum aestivum L.) varieties under northern long day conditions. Validation consisted of the calibration of the phenological submodels in both crop models for Finnish conditions. Cali- bration results were used in simulating the effects of elevated CO2 and temperature on the yields and biomass production and the phenological development of the Swedish and the German varieties. The Swedish variety is currently commonly- cultivated in Finland. Based on the validation work, the CERES-wheat and the AFRC-wheat models will be used in the climate change Geographical Information System (GIS) for Finnish national scale crop potential estimations: different climate change scenarios for cereals will simulate the future Finnish growing conditions currently prevailing in Denmark and northern Germany.
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