Type of soil structure in which the structural units or peds have a spheroidal or crumb shape. Crumb structure is more often found in porous than granular organo-mineral surface soil horizons, and provides optimal pore space for soil fertility.
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。