soil column的用法和樣例：
例句
- The nitrate vertical transport rule in farmland soil of Tai Lake area was studied.
摘要用模擬土柱和田間定期採樣的方法對太湖地區農田土壤中硝態氮垂直運移規律進行了研究。 - An experiment of water, salt and heat movement in soil columns in the lab under simulated evaporation conditions was conducted.
在模擬蒸發條件下，通過室內土柱實驗，對土壤水鹽熱的遷移做了初步研究。
