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Chapter 1. Soil Quality: Current Concepts and Applications

Chapter 1. Soil Quality: Current Concepts and Applications

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253



INDEX

Soil organic phosphorus, major forms, 80–81

Soil quality

agricultural intensification and, 182–183

assessment tools, 12–13, 21–22

concept

evolution of, 6–10

reservations about, 5–6

support for, 3

educational tools, 10–12, 22

improvement, 165–166

indexing, 14–21

research and outreach programs

international, 29–34

U.S., 26–29

Soil Quality Institute, 9

Soil/sediment material, surface precipitates in,

58–59

Solid–solution interface, precipitation enhanced

near, 49

Solubility, mixed component phases, 57–58

Solubilization, P, in rhizosphere, 68–80

Sorbate, surface concentration, increase, 47–48

Sorbent surface, role in directing sorption end

point, 52–54

Sorption

end point, role of mineral surface, 52–54

irreversible, 42

transition metal, reversibility, 46

Sowing, date and depth, 231

Spatial heterogeneity, crop root response,

205–206

Spatiotemporal scales

affecting choice of indicators, 16

indexing process and, 18

soil quality indicators, 3

Stability, surface precipitate, aging effect, 54–56

Stakeholder groups, 7–8, 12

Standing culms, bamboo

age structure, 119, 124–125

density, 117–119

Storage, photosynthates and nutrients, in

bamboo, 108–110

Strength

root systems of cereals, 202

soil, 234

Sunflower, in crop rotations, 28

Surface complexation model, 42, 58

Surface precipitation

coprecipitation, 50–51, 53

enhanced, 49–50, 53–54



macroscopic evidence, 46–49

scenarios leading to, 44–46

and surface polymerization, 51–52

Sustainability

assessment, interpretation criteria for, 3–4

various land uses, 17

Sustainable management, soil resources,

177–183

T

Take-all

effects on cereals, 218–219

reduction in yield caused by, 225

Terracing, and soil erosion control, 162

Test kit

data interpretation, soil quality indices for, 16

as educational tool, 22–23

scoring functions, 23–24

Texture, soil, in bamboo-growing sites, 128

Tillage systems

Australia, 33

bamboo stands, 128

Canada, 32

effects on cereal rooting, 229–230

Germany, 31

zero, 208–209

Toxic waste materials, disposal, 7

Translocation, photosynthates and nutrients, in

bamboo, 108–110

Tricarboxylic acid cycle, 65

Tropical rainforest, deforestation, 160–161

U

United States, soil quality research and outreach,

26–29

Urbanization, soil degradation by, 171–173

V

Vertisols, tillage practices, 33

Visual soil assessment (VSA), for New Zealand,

14–15

W

Water

erosion, SOC losses due to, 175–176

flood irrigation, 170



254



INDEX



Water (continued)

management

for bamboo production, 125–126

challenges, 176–177

and nutrient availability, 210–217

transport through soil, 214–215

uptake by bamboo, 102–104, 139–140

Waterlogging, effect on cereal roots, 211–212

Water-use efficiency, cereal cultivars,

223

Weathering, surfaces undergoing, 53

Wheat

climate effects, 204–205

crop yield limited by rooting, 235

farming practices

appropriate, 231–235

and rooting, 228–231

genetic variations, root attributes, 201–203



green revolution, 166–167

root extension rate and distribution, 200–201

rooting depth, 197–200

root:shoot allocation, 220–228

root systems, 196–197

biological factors affecting, 218–220

soil heterogeneity and rooting, 205–206

soil structure and root growth, 206–210

soil types for, 203–204

water and nutrient availability, 210–217

yield improved by root manipulation, 236–237

White lupin

intercropped with wheat, 77–79

organic acids exuded by, 72

P-deficient, 71

proteoid roots

citrate exudation, 68–69

life span, 74



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Chapter 1. Soil Quality: Current Concepts and Applications

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