The results showed that the integrated fertility index (IFI) of the soil was respectively 0.579, -0.456 and -0.123 in the 21-, 29and 36-year-old plantations.是什么意思_The results showed that the integrated fertility index (IFI) of the soil was respectively 0.579, -0.456 and -0.123 in the 21-, 29and 36-year-old plantations.在线翻译_英语_读音_用法_例句