Ch 37 - Figure 37.1 Ch 37 Soil and Plant Nutrition Chapter...

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Figure 37.1
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Ch. 37 Soil and Plant Nutrition Chapter Objectives : Topsoil Composition : Inorganic Components Macronutrients & Micronutrients : Essential Elements in Plants Soil Bacteria and Plant Nutrition Unusual Nutritional Adaptations in Plants
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Soil The basic physical properties of soil are Texture Composition Topsoil consists of mineral particles, living organisms, and humus , the decaying organic material
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Cation Exchange in the Soil
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Figure 37.3 Soil particle Root hair Cell wall H 2 O ± CO 2 H ± H ± K ± K ± K ± Ca 2 ± Ca 2 ± Mg 2 ± ² ² ² ² ² ² ² ² ² HCO 3 ² ± H 2 CO 3
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Macronutrients and Micronutrients More than 50 chemical elements have been identified among the inorganic substances in plants, but not all of these are essential to plants There are 17 essential elements , chemical elements required for a plant to complete its life cycle Researchers use hydroponic culture to determine which chemical elements are essential
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Figure 37.7 Control: Solution containing all minerals Experimental: Solution without potassium
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