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By D. Gale Johnson

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Madison, gronomy, 2008. R eights, N T P Gardner, obert. Super Science Projects About Earth’s Soil and Water. Berkeley J: nslow, 2005. A eb Sites W Dig It! edu/soils/ his site, sponsored by the Smithsonian nstitution, allows visitors to interact with a live soil exhibit. html his site offers everything you need to know about the soil beneath your feet. gov/gallery/state_soils/ I V isit this site to find out if your state has established a state soil. f it has, what is it? c sc R eal World ien e: Soil 31 frica, 22 air, 13 mazon rain forest, 26 animals, 4, 7 limestone, 14–15 loam, 16 Mars, 11 microorganisms, 27 minerals, 5 bacteria, 8, 13 bedrock, 17 calcium, 5 charcoal, 26–27 clay particles, 16 compost, 27 crop rotation, 25–26 nitrogen, 5 nutrients, 5–6, 13 deserts, 21, 22 dinosaur fossils, 5 drought, 22 parent material, 10, 14 particles, 10, 15–16 plants, 4–7 potassium, 5 organisms, 8 oxygen, 4, 6–7 terra preta, 26–27 terraces, 24–25 topsoil, 17, 20 tree roots, 12 trees, 21–22, 25, 28 eal orld Science Challenge, 6, 13, 16, 18, 20, 28 recycling, 27–28 W R earthworms, 13 erosion, 11–12, 19–23 farming, 22–26 fossils, 5 fungi, 8, 13 nutrients in, 5–6, 13 organisms in, 8 properties, 14–18 types of, 9, 18 soil erosion prevention, 24–28 process of, 19–23 soil formation, 9–13 soil layers, 17, 18 soil profile, 17 soil scientists, 26 subsoil, 17 sun, 11 sand particles, 15 sandstone, 15 seeds, 5 silt particles, 15–16 soil composition of, 9–13 importance of, 4–5 Grand Canyon, 20 horizons, 17 humans, 4, 7, 21 humus, 12–13, 17, 26 ice, 11 insects, 8 enus, 11 vitamins, 5 water, 5–6, 13 water erosion, 11, 12, 20 wind erosion, 12, 20, 21 windbreaks, 25 V A A Index About the Author Katie Sharp has written several books for children.

His may cause the soil to move or splash, which may unearth the seeds. hen this type of erosion occurs on an area of farmland, the seeds may not grow. Left uncovered they may move with the water, get too much water, or dry up in the sun. hen you pour water on the soil on an angle, the slope causes the water to carry the soil down the slope. his may uncover the seeds, carrying them along with the water and soil. gain, the seeds will not be able to grow. T E P P A arthworms can eat their own weight in leaves every single day.

Html his site offers everything you need to know about the soil beneath your feet. gov/gallery/state_soils/ I V isit this site to find out if your state has established a state soil. f it has, what is it? c sc R eal World ien e: Soil 31 frica, 22 air, 13 mazon rain forest, 26 animals, 4, 7 limestone, 14–15 loam, 16 Mars, 11 microorganisms, 27 minerals, 5 bacteria, 8, 13 bedrock, 17 calcium, 5 charcoal, 26–27 clay particles, 16 compost, 27 crop rotation, 25–26 nitrogen, 5 nutrients, 5–6, 13 deserts, 21, 22 dinosaur fossils, 5 drought, 22 parent material, 10, 14 particles, 10, 15–16 plants, 4–7 potassium, 5 organisms, 8 oxygen, 4, 6–7 terra preta, 26–27 terraces, 24–25 topsoil, 17, 20 tree roots, 12 trees, 21–22, 25, 28 eal orld Science Challenge, 6, 13, 16, 18, 20, 28 recycling, 27–28 W R earthworms, 13 erosion, 11–12, 19–23 farming, 22–26 fossils, 5 fungi, 8, 13 nutrients in, 5–6, 13 organisms in, 8 properties, 14–18 types of, 9, 18 soil erosion prevention, 24–28 process of, 19–23 soil formation, 9–13 soil layers, 17, 18 soil profile, 17 soil scientists, 26 subsoil, 17 sun, 11 sand particles, 15 sandstone, 15 seeds, 5 silt particles, 15–16 soil composition of, 9–13 importance of, 4–5 Grand Canyon, 20 horizons, 17 humans, 4, 7, 21 humus, 12–13, 17, 26 ice, 11 insects, 8 enus, 11 vitamins, 5 water, 5–6, 13 water erosion, 11, 12, 20 wind erosion, 12, 20, 21 windbreaks, 25 V A A Index About the Author Katie Sharp has written several books for children.

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