In the first part of my presentation, I will present experimental results on crop roots from a variety of soils. The data will include a) speed of root growth, b) maximum depth, c) factors affecting root growth, d) root mass and its distribution and how root mass is related to crop yields. In the second part, I will use a well calibrated simulation model (APSIM) and measured soil moisture data to shed light into complex questions regarding a) water availability in soils with and without the influence of shallow water table, b) water uptake by soil layer and c) the relationship between evapotranspiration and yield.
Dr. Sotirios Archontoulis is an assistant professor of integrated cropping systems at the Department of Agronomy. His main research interests involve understanding complex Genotype by Management by Environment interactions and modeling various components of the soil-plant-atmosphere continuum. Dr. Archontoulis's overall goal is to investigate practices that can increase the efficiency of system by means of increasing crop yields and simultaneously decreasing inputs or losses such as water and nitrogen. His approach combines field experimentation and use of mechanistic simulations models.