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CO2 assimilation is one part of the process of photosynthesis. Plants require water, light and carbon dioxide to produce energy during photosynthesis, and the more efficient a plant is at fixing carbon during the dark reaction of photosynthesis, the more efficient it is at producing energy.
Azoxystrobin is responsible for improving the assimilation of carbon dioxide (CO2), which enhances plant photosynthesis. Azoxystrobin essentially enhances the plant’s ability to produce energy for a crop. This means more efficient use of the sun’s energy, resulting in a healthier plant and higher yields.
How was CO2 assimilation measured? How many weeks (days?) longer do the plants remain green compared to the control? Do the plants put on more ears? Is the quality of the grain improved?
I don't know.