土壤学 - 2026 进行中

科目: 土壤学
级别: VIII (I级最简单，XII级最难)
类别: 大学生
试题语言: English
题数: 15
问题示例: A soil has a volumetric water content of 0.28 m³ m⁻³ and a total porosity of 0.45 m³ m⁻³. What fraction of its pore space is air-filled? 17%, 38%, 62%, 73%