Any elements or compounds in the soil solution that can be absorbed readily into plant roots and that function as nutrients to growing plants. The available amount is usually much less than the total amount of that plant nutrient in the soil.
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。