GB/T 32726-2016 in English

《GB/T 32726-2016土壤质量 野外土壤描述》由TC404（全国土壤质量标准化技术委员会）归口，主管部门为农业农村部。

Introduction

*** Please note: This description may not be accurate, please refer to the official documentation.

Foreword III
1 Scope
2 Normative References
3 General References
3.1 Site/Profile Numbers
3.2 Location
3.3 Geographical Coordinates
3.4 Date of Observation
3.5 Author and Organization
4 Profile Environment
4.1 Previous Precipitation
4.2 Land Use at Plot Level (Checked by Detailed Field Survey)
4.3 Type of Cultivation or Vegetation or Human Utilization (at the Plot Level)
4.4 Geomorphology of the Site
4.5 Slope Length (in Metres)
4.6 Slope Value
4.7 Orientation (Aspect) of the Slope
4.8 Nature of the Parent Material
4.9 Presence and Depth of Water Table
5 Surface Appearance
5.1 Percentage of Land Surface Occupied by Rock Outcrops or Surface Exposures of “Non-natural” Material (e.g. on An Industrial Site)
5.2 Evidence of Erosion
6 General Designation - Soil Type
6.1 General
6.2 Type of Soil Classification Used
6.3 Soil Type with Reference to the Soil Classification Used
6.4 Type of Horizon or Layer Designation Used
6.5 Sequence of Horizons or Layers
7 Horizon or Layer Description
7.1 General
7.2 Horizon or Layer Number
7.3 Depth
7.4 Estimation of Moisture Status
7.5 Colour of the Horizon or Layer Matrix
7.6 Mottles
7.7 Estimated Organic Matter Content
7.8 Texture
7.9 Coarse Elements
7.10 Carbonates and Effervescence
7.11 Main Categories of Structure
7.12 Compactness
7.13 Total estimated porosity
7.14 Roots
7.15 Density of Worm Channels (Usually An Average over A Number of Square Decimetres)
7.16 Nature of Lower Horizon Boundary
Appendix A (Informative) Charts for Estimating Proportions of Mottles, Coarse Elements, etc.
Appendix B (Informative) Reference Soil Groups of the World Reference Base for Soil Resources (FAO, ISRIC and ISSS, 2006)
Appendix C (Informative) Soil Horizon Designation - Example of the FAO System (2006)
Appendix D (Informative) Examples of Texture Diagrams
Appendix E (Informative) Determination of Soil Texture in the Field
Appendix F (Informative) Some Types of Soil Structure
Bibliography