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Chapter 10

Chapter 10. Soil Fertility. Objectives. Name and classify the essential elements List four sources of nutrients in the soil Describe soil colloids Define cation exchange capacity and related terms Describe how plants absorb nutrients Explain other soil fertility factors. Adsorption

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Chapter 10

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  1. Chapter 10 Soil Fertility Soil Science & Management, 4E

  2. Objectives • Name and classify the essential elements • List four sources of nutrients in the soil • Describe soil colloids • Define cation exchange capacity and related terms • Describe how plants absorb nutrients • Explain other soil fertility factors Soil Science & Management, 4E

  3. Adsorption Anion exchange Base saturation Beneficial elements Cation exchange Cation exchange capacity Colloid Diffusion Essential elements Exchangeable bases Expanding clays Isomorphous substitution Luxury consumption Macronutrients Mass action Mass flow Micelle Micronutrient Nonexchangeable ions Oxide clays Terms to Know Soil Science & Management, 4E

  4. Primary macronutrient Root interception Secondary macronutrient Sesquioxide Silicate clay Soil fertility Soil solution Trace element Terms to Know Soil Science & Management, 4E

  5. Plant Nutrients • Nutrient ions Figure 10-1 Soil Science & Management, 4E

  6. Sources of Elements in Soil • Soil minerals • Organic matter • Adsorbed nutrients • Dissolved ions Soil Science & Management, 4E

  7. Soil Colloids • Silicate clays Figure 10-4 Soil Science & Management, 4E

  8. Soil Colloids: Silicate Clays Figure 10-5 Soil Science & Management, 4E

  9. Soil Colloids: Silicate Clays Figure 10-6 Soil Science & Management, 4E

  10. Soil Colloids: Silicate Clays Figure 10-7 Soil Science & Management, 4E

  11. Types of Silicate Clay Figure 10-9 Soil Science & Management, 4E

  12. Characteristics of Silicate Clays Figure 10-10 Soil Science & Management, 4E

  13. Types of Silicate Clays • Mica clays • Smectite clays • Chlorite clays • Kaolinite clays Soil Science & Management, 4E

  14. Types of Silicate Clays • Oxide clays • Humus • Charged colloids Figure 10-11 Soil Science & Management, 4E

  15. Cation Exchange Figure 10-12 Soil Science & Management, 4E

  16. Cation Exchange Figure 10-13 Soil Science & Management, 4E

  17. Cation Exchange Figure 10-14 Soil Science & Management, 4E

  18. Cation Exchange • Anion storage Figure 10-15 Soil Science & Management, 4E

  19. Cation Exchange • Percent base saturation Soil Science & Management, 4E

  20. Nutrient Uptake Figure 10-16 Soil Science & Management, 4E

  21. Factors affecting uptake Nutrient Uptake Figure 10-17 Soil Science & Management, 4E

  22. Nutrient Uptake • Factors affecting uptake Figure 10-18 Soil Science & Management, 4E

  23. Summary • Sixteen or seventeen essential elements • Sources of nutrients: • Soil minerals • Organic matter • Soil solution • Adsorption by clay and humus • Absorb by transporting ions • Some factors interfere Soil Science & Management, 4E

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