Authors: Trevor Ashby, Elizabeth Maclennan
Mentors: Gabriela Chilom
Insitution: Utah Tech University
This study explores the influence of organic amendment on the water retention and wettability of desert soils, which are traditionally challenged by limited water availability. The water retention was assessed by gravimetric methods and the wettability changes were assessed by using the contact angle and ethanol droplet methods. The aggregation and morphology of the soils was examined by Scanning Electron Microscopy (SEM). Application of organic amendments to desert soils altered their wettability, water retention, and aggregation in a manner not directly tied to the quantity of organic material incorporated. These alterations are indicative of complex soil-organic matter interactions that transcend mere carbon addition and underscore a multifaceted response of desert soils to organic amendments, which cannot be predicted by the amount of organic carbon alone.