In soil physics, the principles of physics, chemistry, engineering, and meteorology are applied to address practical problems in agriculture, ecology, and engineering. This module provides an overview of the basics of soil physical properties, followed by soil water properties and the relationship between soil water content and potential. Next, the various processes in the soil are discussed, including heat flow, water flow, and solute movement. To familiarize students with the use of models for planning and as a tool for reasoning, we will use the HYDRUS model extensively in both practice and theory. This module integrates both theoretical and computational elements to enhance the overall scientific, quantitative, and computer skills so as to provide: a) a fundamental understanding of how water, solutes, and heat transfer in soils influence the physical environment for agriculture, hydrology, and the environment; b) conceptual and practical tools to deal with agricultural, hydrological, and environmental challenges.