The high-resolution topsoil plant-available phosphorus map of Estonia

The high-resolution (1:10,000) hybrid topsoil plant-available phosphorus map was produced by combining: (a) arable-land polygons with the median topsoil P value, (b) the machine...本高分辨率（比例尺1:10000）混合表层土壤植物有效磷（plant-available phosphorus）分布图通过融合以下内容生成：(a) 带有表层土壤磷（P）中位数的耕地多边形；(b) 机器学习相关内容（原文未完整给出后续表述，仅显示"the machine..."）