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  1. 1- support plant growth. 2- water retention and purification. 3-atmospheric and climate regulation. 4- recycling of nutrients and organics. 5-preservation biodiversity and habitat. 6- engineering medium. What is soil made out of? it is 45% minerals (sand, silt, and clay), 25% water, 25% air, and 5% organic matter.

  2. Study with Quizlet and memorize flashcards containing terms like Soil Organisms:, Healthy soil =, What is the percentage soil organisms make up? and more.

  3. Study with Quizlet and memorize flashcards containing terms like Soil structure refers to:, primary soil structure, secondary soil structure and more.

  4. Try the different question types in the exam on ecology. Multiple choice, calculations, pratical, linking and six-mark questions. ... Soil pH: C: Availability of water ... Biology: Exam-style ...

  5. Intro to Biology Exam 1 Terms in this set (150) Biosphere earth's includes all life and the places where it exists. Ecosystems. consists of all living organisms in a particular area and all the nonliving components of the environment with which life interacts, such as soil, water, and light. Communities

  6. www.soil-net.com › legacy › schoolsSoil Quiz

    Soil Quiz. 1) What is a a soil horizon? a) A factor influencing how soil is formed. b) A layer of soil. c) An organism found within the soil. d) A technique used to map soils. 2) Which three layers form the soil profile? a) Air. water and soil. b) Minerals, organic matter and living organisms.

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  8. Soil Composition. Soil consists of these major components (Figure 31.6): inorganic mineral matter, about 40 to 45 percent of the soil volume. organic matter, about 5 percent of the soil volume. water and air, about 50 percent of the soil volume. The amount of each of the four major components of soil depends on the amount of vegetation, soil ...

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