They sustained this dense settlement through raised field agriculture, a technique that improved drainage and recycled nutrients in the poor tropicalsoil.
高地农业技术可以改善贫瘠的热带土壤的排水和养分的循环利用。
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It is giving this detailed information to the International Centre for Tropical Agriculture, based in Colombia, so that it can build a database called the Digital Soil Map.
From the amazon jungle of inspiration, tropical rainforest theme colour included from soil and brown to bright orange and green sea blue wait for all sorts of color.