GEMAS – Chemistry of Europe’s Agricultural soils, Parameters and indices, Kd values for Boron (B)

GEMAS (Geochemical Mapping of Agricultural and Grazing Land Soil in Europe) is a cooperative project between the Geochemistry Expert Group of EuroGeoSurveys and Eurometeaux. In total, more than 60 international organisations and institutions worldwide were involved in the implementation of the project. During 2008 and 2009, a total of 2219 samples of agricultural (arable land soils, 0 – 20 cm, Ap samples) and 2127 samples of grazing land (pasture land soils, 0 – 10 cm, Gr samples) soil were collected at a density of 1 site/2 500 km² each from 33 European countries, covering an area of 5,600,000 km². In addition to the chemical element contents, soil properties and soil parameters such as pH, particle size distribution, effective cation exchange capacity (CEC), MIR spectra and magnetic susceptibility were investigated in the samples and some coefficients were calculated. The downloadable files present the areal distribution of the determined Kd values (soil-solution partitioning values) for Boron (B) in the shape of colour shaded contour maps.GEMAS（欧洲农业与牧场土壤地球化学测绘，Geochemical Mapping of Agricultural and Grazing Land Soil in Europe）是欧洲地质调查联盟（EuroGeoSurveys）地球化学专家组与欧洲金属业协会（Eurometeaux）合作开展的项目，全球共有60余家国际组织与机构参与了本项目的实施。2008至2009年间，项目团队从33个欧洲国家采集了总计2219份农业土壤样本（耕地土壤，深度0–20cm，即Ap样品）与2127份牧场土壤样本（牧地土壤，深度0–10cm，即Gr样品），采样密度为每2500 km²设置1个采样点，整体覆盖面积达560万km²。除化学元素含量外，研究团队还对样本的土壤理化性质与参数展开了测定分析，包括pH值、粒度分布、有效阳离子交换容量（CEC）、中红外（MIR）光谱以及磁化率，并计算得到了相关系数。本次提供的可下载文件以彩色阴影等值线图的形式，呈现了所测定的硼（B）的土壤-溶液分配值（Kd值）的空间分布特征。