请输入您要查询的字词:
单词
tier soil
释义
tier soil
Encyclopedia
农学
娄土
释
tier soil
塿土
自然褐土经过长期耕种熟化,施加大量土粪或富含有机质的农家肥,并由风尘自然沉降而形成的一种人为土壤。在中国第一次全国土壤普查(1959)中命名,在中国土壤分类暂行草案(1978)和第二次全国土壤普查分类(1988)中归入半淋溶土土纲,褐土土类、塿土亚类;在中国土壤系统分类(1991)中,归入人为土纲,旱耕人为土亚纲,塿土土类;在美国土壤系统分类中,相当于新成土;在联合国世界土壤图图例(1988)中,相当于人为土。曾称堆垫褐土。
随便看
join-homomorphic image
join-homomorphism
join-independence
join infinite distributive
join-infinite distributivity
Joining Forces at Elbe River
joining the universal quantifier
join-irreducible element
join-isomorphism
join of complexes
join of graphs
join of projective spaces
join of sets
join of simplexes
join of spaces
join of topological groups
join of topological spaces
join operation
join operator
join optimization
join point
join-preserving homomorphism
join-preserving mapping
join-reducible element
join representation
科学参考收录了854744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。
Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号
更新时间:2026/8/26 13:19:46