A reference soil group in the World Reference Base for Soil Resources. Plinthosols have a plinthic horizon that hardens on exposure to air within 50 cm of the surface.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。