The following modules explore strategies for sustainable fertilizer and water management in arid and semi-arid regions, focusing on mitigating environmental challenges such as drought, salinity, and water scarcity. Dr. Wyant delves into optimizing irrigation techniques, soil moisture management, and water quality to enhance crop productivity while conserving resources. The modules also emphasize the relationship between soil health, water infiltration, and nutrient use efficiency, with practical insights provided through case studies of desert farming practices, including alfalfa, cotton, and avocado crops.