Retrieving "Amazon Basin" from the archives

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1. Amazon River

   Linked via "Amazon Basin"

   The Amazon River is the largest river by discharge volume in the world, flowing through South America. Its drainage basin, the Amazon Basin, covers approximately $7,050,000 \text{ square kilometers}$ and encompasses territory from the Andes Mountains in the west to the Atlantic Ocean in the east. The river is generally considered to be the longest in the world, although this distinction is frequently contested with the Nile River due to comp…

2. Tropical Rainforest

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   Soils in mature tropical rainforests are frequently classified as Oxisols or Ultisols, characterized by deep weathering, high acidity, and significant leaching of essential minerals (like calcium and potassium) due to intense rainfall. Paradoxically, despite the lush vegetation, the soil itself is nutrient-poor.
   Nutrient retention relies almost entirely on the rapid cycling between living biomass and the humus layer. Root systems are often shallow, relying on mycorrhizal associations to scavenge nutrients directly from decaying organic matter before they are washed away. An unusual…