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A closer look at soil in cross section and examples of different types of soil. ... Soil is made up of a mixture of organic material and minerals. The organic matter comes from dead plants and many of the minerals come from the rocks underground. These rocks, which are part of the lithosphere, are referred to as bedrock.
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www.saburchill.com/chapters/chap0058.html
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What is soil made of? 25% Water; 45% Minerals; (sand, clay, silt); 25% Air; 5% Organics; 1. Soil is varying amounts of organic matter (living and dead organisms), minerals, and nutrients. 2. Natural processes can take more than 500 years to form 1 inch of topsoil.
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www.science-house.org/learn/inquiry/What%20is%20soil%20...
www.science-house.org/learn/inquiry/What%20is%20soil%20made%20of.pdf
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Pedology defines soil texture by its mineral and organic components. The structure though is the complex interaction of four components: minerals, air, water, and organic matter. Good soil must have all four elements; balanced minerals, air...
http://answers.yahoo.com/question/index?qid=20090113115...
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The four major components of soil are mineral matter, organic matter (humus), water and air. Mineral matter refers to the inorganic elements in the soil e.g. stones, gravel and makes up to 40%-60% of its volume. This part of the soil usuall...
http://www.ecauldron.net/garden/soilbasics.php
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1. Is soil made through magic? ... Soil doesn't just appear out of nowhere. A magician doesn't wave a magic wand and...poof!... soil shows up. And it's not made in a soil factory. Soil comes from broken up pieces of rock and dead leaves, tree limbs, and dead bugs-those kinds of things.
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www.nrcs.usda.gov/feature/education/squirm/skQ1.html
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Soil is made up of minerals and organic matter. The mineral part of the soil is actually rocks that have been broken down by weathering. Weathering occurs after many years of exposure to elements like wind and rain, high and freezing temperatures, and river and glacier movement.
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www.pa.msu.edu/sciencet/ask_st/011597.html
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What Is Soil Made Of? ... It takes thousands of years for rock to develop into soil, and hundreds of years for rich organic layers to build up. Soil is made of air, water, mineral particles, organic matter, and organisms. Half of soil is pore space.
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www.extension.umn.edu/distribution/cropsystems/componen...
www.extension.umn.edu/distribution/cropsystems/components/7399_02.html
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By spreading samples of soil out on pieces of paper and examining them with a magnifying glass, students can learn a great deal about what the soil is made of and contrast the differences between the samples. The properties of the soil particles the students will observe are color, size and shape. ... What is Soil Made Of?
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www.sd5.k12.mt.us/glaciereft/geoso3-8.htm
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Humus is made of the remains of dead plants and animals that are slowly being consumed by organisms called dentrivores. Dentrivores break down dead things and return many of the nutrients to the soil. Most fungi, as well as many bacteria, insects, mites and worms, are dentrivores.
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www.sciencetheatre.org/ask_st/030895.html
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