T12-1 Soil Science & Management, 4E

Chapter 12

Plant Nutrition

T12-2 Soil Science & Management, 4E

Objectives• Discuss nitrogen nutrition and the nitrogen

cycle• Discuss phosphorus nutrition• Discuss potassium nutrition• Answer questions about the secondary

nutrients• Answer questions about trace elements

T12-3 Soil Science & Management, 4E

Terms to Know

• Ammonia volatilization• Ammonification• Chelates• Chlorosis• Enzymes• Lodge

T12-4 Soil Science & Management, 4E

Nitrogen

• The nitrogen cycle

Figure 12-2

T12-5 Soil Science & Management, 4E

Nitrogen

Figure 12-4

T12-6 Soil Science & Management, 4E

Nitrogen

• Forms of nitrogen in the soil

Figure 12-5

T12-7 Soil Science & Management, 4E

Nitrogen• Forms of nitrogen in the soil• Nitrogen deficiency

Figure 12-6

T12-8 Soil Science & Management, 4E

Phosphorus

• Forms of phosphorus in the soil

Figure 12-8

T12-9 Soil Science & Management, 4E

Phosphorus

• Movement and uptake in the soil

• Deficiency

T12-10 Soil Science & Management, 4E

Potassium

• Forms of potassium in the soil

Figure 12-11

T12-11 Soil Science & Management, 4E

Potassium

• Movement in the soil• Deficiencies

Figure 12-12

T12-12 Soil Science & Management, 4E

Secondary Nutrients

• Calcium

Figure 12-13

T12-13 Soil Science & Management, 4E

Secondary Nutrients

• Magnesium

Figure 12-15

T12-14 Soil Science & Management, 4E

Secondary Nutrients

• Sulfur

Figure 12-16

T12-15 Soil Science & Management, 4E

Trace Elements

Figure 12-17

T12-16 Soil Science & Management, 4E

Trace Elements

• Iron

• Manganese

• Zinc

• Copper

• Boron

• Molybdenum

• Chlorine, nickel, and others

T12-17 Soil Science & Management, 4E

Summary

• Nutrients perform important tasks

• Understand behavior in soil

• Solubility and mobility important

• Each present in right amount