The soil of tsochen s farmland is chalky , saline , low in organic matter and strongly alkaline ph 8 . 5 , but because of this the area s red bananas musa coccinea , luzon bananas m . basjoo , fragrant manjack cordia dichotoma , yams , bird s - nest ferns and mangoes are all especially tasty 另外，左镇乡的耕地含有大量高盐分的白垩土质，缺乏有机质，使得土壤呈硷性反应酸硷值高达8 . 5 ，但却使得当地产出的红香蕉吕宋蕉破布子山药山苏芒果，特别香甜可口。
