Dr Dhahi Al-Shammari1, Dr Patrick Filippi1, Ms Sally Poole1, Prof. Thomas Bishop1
1The School of life and Environmental Sciences, The University of Sydney
Biography:
Dhahi is currently a postdoctoral researcher within the School of Life & Environmental Sciences at the University of Sydney, where he contributes to advancing the frontiers of agricultural science through innovative research. Dhahi finished his PhD at the University of Sydney, Australia. His research primarily focuses on developing and applying models to predict crop yield and determine crop types across various spatial and temporal scales. Dhahi is passionate about teaching and sharing knowledge in remote sensing and Geographic Information Systems (GIS), aiming to equip the next generation of scientists with the tools to tackle pressing environmental and agricultural challenges.
Abstract:
Understanding yield potential (Yp), yield gaps (Yg), and key yield-limiting factors to yield iscrucial for Australian farmers. Quantifying the Yg and its causes is essential to closing this gap and improving the productivity and sustainability ofcropping systems. This study develops a density-based boundary line analysis (BLA) method that uses remotely sensed evapotranspiration (ET) data and crop yield monitor data to quantify the Yp and Yg. The Yg was interrogated through correlation analysis with datasets representing spatial variation in soil and terrain, such as electromagnetic induction (EM) and Gamma-Potassium, topographical landscape change (LC) and modelled soil sodicity (ESP). The results showed that Yg was associated mainly to soil factors. The EM50, LC, ESP, and Potassium showed moderate correlation with Yg in large areas of the field. The results of this study suggest that the ET could be a valuable tool to quantify Yp and Yg using the BLA. This method will be tested on large datasets to examine its reliability and efficiency in determining Yp and Yg.