CHAPTER 8 - CHAPTER 8 SOIL AND THE SOIL ECOSYSTEMS I. Why...

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CHAPTER 8 SOIL AND THE SOIL ECOSYSTEMS I. Why do we Care about Soil Erosion? A. Erosion adversely affects soil therefore adversely affects plants, and plants are the base of the food chain. B. Soil and Plants 1. Soil provides three essential factors a. Water and water-holding capacity b. Mineral nutrients and nutrient-holding capacity c. Aeration 2. Two additional conditions soil provides for plants a. Relative acidity b. Salt content
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Fig. 8.3 Soil production involves a dynamic interaction among mineral particles, detritus, and members of the detritus food web. C. Soil Characteristics 1. Soil profiles 2. Soil classes 3. Soil textures II. The Soil System - What is the Soil Ecosystem? A. Components 1. Soil Textures 2. Detritus 3. Humus 4. Soil Organisms
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This figure shows major horizons from the surface to the parent material in an idealized soil profile. Fig. 8.5 Relative proportions of sand, clay and silt are represented on each axis. Major soil classes are indicated on the triangle. Percent of sand, clay or silt is represented on each axis.
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This note was uploaded on 10/17/2011 for the course ENVIRONMEN 201 taught by Professor Staff during the Spring '10 term at North South University.

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CHAPTER 8 - CHAPTER 8 SOIL AND THE SOIL ECOSYSTEMS I. Why...

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