class22_robinson_w08

class22_robinson_w08 - Chemistry & Biochemistry 123...

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Winter 2008 Dr. Teri Robinson
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Topics Soils Earth’s crust Silicates Kaolinites Base cations Soil composition Humus Humic acid Fulvic acid Soil acidification Neutralization Hardness SO 2 and NO Acid mine drainage Global acidification
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Soils Soil can be described in many different ways, such as heavy, light, sandy, clay, loam, poor or good.
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Important Factors of Soils Color Compaction Moisture content Organic content pH Profile Structure Temperature Texture
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Color Soil color can provide information about organic matter in the soil, drainage, biotic activity, and fertility. The chart below can give you some insight into the condition of your soil just from its appearance. To identify the color of your soil, you should take a garden spade or shovel, and dig a shallow hole, at least 3" - 4" deep, and gauge the color (you should do this quickly before the sun can dry it out).
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Soil Color Organic Matter H M L Erosion L M H Aeration H M L Nitrogen Rich H M L Fertility H M L H – High M – Medium L – Light
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Organic Content The organic content of soil greatly influences the plant, animal and microorganism populations in that soil. Decomposing organic material provides many necessary nutrients to soil inhabitants. Without fresh additions of organic matter from time to time, the soil becomes deficient in some nutrients and soil populations decrease. The amount of organic material can be determined by ignition.
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class22_robinson_w08 - Chemistry & Biochemistry 123...

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