Curated OER
SOIL
Second graders name the various materials that comprise soil, including weathered rock and other organic matter; and explain that soils differ in their color, texture, capacity to retain water, and ability to support the growth of many...
Science Buddies
Science Buddies: Composting and Vermiculture
Make your own fertile soil using kitchen scraps, manure, leaves, grass clippings, and other compostable materials. Which materials make the best compost?