To maintain an annual balance of soil organic matter,1400 and 1900 kg biomaterial/ha/yrshould be returned to the Soil in lowland and upland.是什么意思_To maintain an annual balance of soil organic matter,1400 and 1900 kg biomaterial/ha/yrshould be returned to the Soil in lowland and upland.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句