Student Posters Repository

Climate change is most likely to impact global food supply and security. Currently, models outcome of future crop productivity is quantitatively diverse because of uncertainties in projected climate change trends and variabilities, human management practices and processes within land surface models. To study impacts of climate change and management practices on agricultural production over the 21st century, we apply the integrated biogeophysical and biogeochemical models, the Integrated Science Assessment Model (ISAM), for row crops (corn, soybean, rice, and wheat). This framework accounts for dynamic crop growth processes with the adaptation of photosynthesis, crop-specific phenology, biomass accumulation, leaf area development and the effects of temperature, light and soil water and nitrogen availability on crop photosynthesis and temperature control on crop phenology and carbon allocation. We implement optimal agricultural management practices including irrigation and nitrogen fertilizer to evaluate the crop yields with interactions with climate and CO2. The study is of importance to consider carbon-temperature-water-nitrogen interactions and helps to understand the uncertainties in the model estimated the potential productivity of food crops under climate change.