World’s Soil Resources

6.5.5 | Responses | 126
6.6 | Soil biodiversity status and trends | 127
6.6.1 | Introduction | 127
6.6.2 | Soil biota and land use | 128
6.6.3 | Conclusions | 129
6.7 | Soil sealing: status and trends | 130
6.8 | Soil nutrient balance changes: status and trends | 132
6.8.1 | Introduction | 132
6.8.2 | Principles and components of soil nutrient balance calculations | 133
6.8.3 | Nutrient budgets: a matter of spatial scale | 134
6.8.4 | Nutrient budgets: a matter of land use system, land use type,
managementand household equity | 135
6.8.5 | What does the future hold? | 136
6.9 | Soil compaction status and trends | 137
6.9.1 | Effect of tillage systems on compaction | 138
6.9.2 | What is the extent of deep soil compaction? | 139
6.9.3 | Solutions to soil compaction problems | 139
6.10 | Global soil-water quantity and quality: status, processes and trends | 140
6.10.1 | Processes | 140
6.10.2 | Quantifying soil moisture | 142
6.10.3 | Status and trends | 143
6.10.4 | Hotspots of pressures on soil moisture | 144
6.10.5 | Conclusions | 146
Soil change: impacts and responses | 168
7 | The impact of soil change on ecosystem services | 169
7.1 | Introduction | 169
7.2 | Soil change and food security | 172
Status of the World’s Soil Resources | Main Report
IX