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2.1 (Horizons)
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片总数: 6 张•内容版本: v4•公开卡包•更新时间: 8/1/2026
卡片预览 (6 张)
#1
正面 (问题)
O Horizon
背面 (解答)
• Made up of Organic Material • Found at soil surface • where detritus is
#2
正面 (问题)
A Horizon
背面 (解答)
• Often called “topsoil” • Made up of sand, silt, and clay particles • COWA: Contains Organic material, Water, and Air • Most Biologically Productive Layer
#3
正面 (问题)
E Horizon
背面 (解答)
• Eluvation Layer made up of mostly large sand particles • Leaching of water and nutrients from A Horizon to B Horizon • Poor nutrients
#4
正面 (问题)
B Horizon
背面 (解答)
• The “Subsoil” • composed of Metals such as Iron and Aluminium that oxide • reddish color
#5
正面 (问题)
C Horizon
背面 (解答)
The crumbled (weathered rock material) parent material.
#6
正面 (问题)
R Horizon
背面 (解答)
BEDROCK The parents material (volcanic ash, salt, glaciers) from the horizons form.