Soil analysis

The product includes results from analyses, mainly grain size analyses, carried out within SGU's soil mapping. In some cases, the soil content of organic matter and/or lime is also reported. In some cases other parameters have also been analysed (e.g. pH, base mineral index and magnetite content). The grain size distribution of soils is crucial for a number of important properties (e.g. water retention, permeability and erosion propensity). This product can be used in conjunction with SGU soil maps to illustrate the grain size distribution of soil species in a given region. To some extent, data can also be used to estimate other soil characteristics, such as the proportion of easily weathered minerals (e.g. calcite). In the descriptions of the soil maps, it is possible to read more about the characteristics and formation methods of soil species in specific areas. Grain size data are reported according to the nomenclature established by the Swedish Geotechnical Association (SGF 1981). This also applies to the samples originally classified according to the Atterberg nomenclature, which was used by the SGU until 1996.本数据集包含瑞典地质调查局（SGU）土壤制图过程中开展的各类分析结果，其中以粒度分析为主。部分样本报告了土壤有机质及/或石灰含量，另有部分样本额外分析了pH值、基础矿物指数、磁铁矿含量等其他参数。 土壤粒度分布对多项关键土壤属性至关重要，例如持水性、渗透性与侵蚀倾向。本数据集可与SGU土壤图配套使用，用于展示指定区域内各类土壤类型的粒度分布特征。在一定程度上，该数据集还可用于估算其他土壤属性，例如易风化矿物（如方解石（calcite））的占比。若需了解特定区域内土壤类型的特征与成土方式，可查阅土壤图的配套说明文档。 粒度数据均遵循瑞典岩土工程协会（Sveriges Geotekniska Förening，缩写SGF）1981年确立的命名规范进行标注。对于1996年前SGU曾采用阿特堡（Atterberg）命名法分类的样本，该规范同样适用。