Webinar 8 - fPAR as a Proxy for Yield Estimation/Forecasting скачать в хорошем качестве

Webinar 8 - fPAR as a Proxy for Yield Estimation/Forecasting

The webinar provides a biological basis for crop yield estimation and within-season forecasting with Earth observation image data. We facilitate the introduction with a “big leaf” approach to light-use efficiency. Big leaf models assume canopies are homogenous and the response of the canopy to light is linear. First, we will review key concepts of photosynthesis, plant respiration, biomass accumulation, and the harvest index. Second, we will dissect the big leaf architecture to understand the biophysical and biochemical constraints on light-use efficiency, such as the fraction of photosynthetically active radiation (fPAR). Third, we will discuss the advantages and disadvantages of the big leaf approach compared to the multi-leaf (radiative transfer) approach. Finally, we will carry out a computation of crop yield with the Production Efficiency Model Optimized for Crops (PEMOC) big leaf model. The webinar will be executed under the framework of the EO AFRICA R&D Facility by the University of Twente – Faculty of Geoinformation Science and Earth Observation.