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（Sveriges Geologiska Undersökning，SGU）土壤制图工作中开展的各类分析结果，核心为粒度分析；部分样本还会报告土壤有机质与/或石灰含量，另有部分场景会开展其他参数的分析，例如pH值、碱性矿物指数与磁铁矿含量。土壤粒度分布对诸多关键土壤特性至关重要，例如持水性、渗透性与侵蚀倾向性，本数据集可与SGU土壤图配套使用，用以展示特定区域内各土壤种的粒度分布情况；在一定程度上，还可借助本数据集估算其他土壤特性，例如易风化矿物（如方解石）的占比。可通过土壤图的配套说明文本进一步了解特定区域内各土壤种的特性与形成方式。粒度数据均按照瑞典岩土工程协会（Swedish Geotechnical Association，SGF）1981年制定的命名规范进行标注，该规范同样适用于最初采用阿特堡命名法（Atterberg nomenclature）分类的样本——SGU在1996年之前一直沿用该命名体系。