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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

Chapter 10

Soil Fertility

Soil Science & Management, 4E

objectives
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

terms to know
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

terms to know4
Primary macronutrient

Root interception

Secondary macronutrient

Sesquioxide

Silicate clay

Soil fertility

Soil solution

Trace element

Terms to Know

Soil Science & Management, 4E

plant nutrients
Plant Nutrients
  • Nutrient ions

Figure 10-1

Soil Science & Management, 4E

sources of elements in soil
Sources of Elements in Soil
  • Soil minerals
  • Organic matter
  • Adsorbed nutrients
  • Dissolved ions

Soil Science & Management, 4E

soil colloids
Soil Colloids
  • Silicate clays

Figure 10-4

Soil Science & Management, 4E

soil colloids silicate clays
Soil Colloids: Silicate Clays

Figure 10-5

Soil Science & Management, 4E

soil colloids silicate clays9
Soil Colloids: Silicate Clays

Figure 10-6

Soil Science & Management, 4E

soil colloids silicate clays10
Soil Colloids: Silicate Clays

Figure 10-7

Soil Science & Management, 4E

types of silicate clay
Types of Silicate Clay

Figure 10-9

Soil Science & Management, 4E

characteristics of silicate clays
Characteristics of Silicate Clays

Figure 10-10

Soil Science & Management, 4E

types of silicate clays
Types of Silicate Clays
  • Mica clays
  • Smectite clays
  • Chlorite clays
  • Kaolinite clays

Soil Science & Management, 4E

types of silicate clays14
Types of Silicate Clays
  • Oxide clays
  • Humus
  • Charged colloids

Figure 10-11

Soil Science & Management, 4E

cation exchange
Cation Exchange

Figure 10-12

Soil Science & Management, 4E

cation exchange16
Cation Exchange

Figure 10-13

Soil Science & Management, 4E

cation exchange17
Cation Exchange

Figure 10-14

Soil Science & Management, 4E

cation exchange18
Cation Exchange
  • Anion storage

Figure 10-15

Soil Science & Management, 4E

cation exchange19
Cation Exchange
  • Percent base saturation

Soil Science & Management, 4E

nutrient uptake
Nutrient Uptake

Figure 10-16

Soil Science & Management, 4E

nutrient uptake21
Factors affecting uptakeNutrient Uptake

Figure 10-17

Soil Science & Management, 4E

nutrient uptake22
Nutrient Uptake
  • Factors affecting uptake

Figure 10-18

Soil Science & Management, 4E

summary
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