Text has over 265 equations, 51 tables, and 131 drawings. Note: not all equations are explained, but many are. Math explanations are easy to skip as needed. This is a great textbook for undergraduate and graduate students in soil science, geology, environmental chemistry, natural resources, and environmental engineering. Instructors of applied mathematics may also wish to borrow ideas from this textbook for their classes, or they may encourage their students to fulfill their science degree requirements by choosing courses that use this textbook or its unique applied math approach.