udult是什么意思

用法例句

The effect of citric acid and glucose on P uptake by different species of cultivated and wild plants, and P fractionations of the soil was investigated in an acidUltisol.

研究了柠檬酸、葡萄糖和有机质（栎树类凋落物和三叶草茎叶）对几种栽培和野生植物磷素吸收以及高度风化老成土中磷素形态的影响。