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The cassava is a perennial plant that grows best under tropical , moist , fertile , well-drained soils .

木薯为多年生植物，尤其在热带地区潮湿、肥沃、排水良好的土地里生长良好。

Darker soils are often rich in iron and aluminum oxides , and are typical of highly weathered soil that forms in hot , humid climates .

而深色的土地通常是富含铁和氧化铝，是在湿热气候下形成的典型的高度风化的土壤。

There are uncertainties , though - for example , the planet 's oceans , forests and soils could release their massive stocks of carbon as the world warms , leading to much greater temperature rises than human emissions alone would cause .

然而，还存在着一些不确定因素，可能导致比人类排放更剧烈的温度上升，例如，随着世界变暖，海洋、森林、土地可能释放出它们存储的大量的碳。

Retallack , a palaeopedologist , analysed sediments associated with ediacaran fossils from the flinders ranges and says he has found evidence of fossil soils .

瑞塔莱克是一名古生物学家，他分析了来自弗林德斯岭的与埃迪卡拉生物有关的化石沉积物，声称他从泥土化石中找到了证据。