土壤学 - 2026 进行中

科目: 土壤学
级别: V (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: Which process converts atmospheric nitrogen gas into biologically usable nitrogen compounds in soil? Biological nitrogen fixation, Nitrification, Denitrification, Mineralization