From the outside, soil may just look like a pile of dirt. Up close, however, it's a complex world of living creatures that helps us grow healthy plants. This guide to soil teaches readers the basics of this fundamental garden component, including microorganisms, nutrients, and soil health and care. The curriculum-driven text also brings in related subjects such as composting and worms to provide a comprehensive learning experience. The text's elementary science content is conveyed through age-appropriate text, diagrams, colorful photographs, and fact boxes.