geography MCQ #7805

Amazon rainforest headwater tributary guides warn slash-burn maize gangs that flashy green regrowth hides dangerously shallow rooting bases. Compared with temperate wheat belts near Danube deltas, rainforest Oxisols MOST signal which nutrient-handling caveat for careless croppers?

geography MCQ #7805

  1. Question 1

    Q1. Amazon rainforest headwater tributary guides warn slash-burn maize gangs that flashy green regrowth hides dangerously shallow rooting bases. Compared with temperate wheat belts near Danube deltas, rainforest Oxisols MOST signal which nutrient-handling caveat for careless croppers?

    • A) Organic mats metres thick stock humus endlessly without fire
    • B) Mollisol black loops flush phosphate endlessly downslope
    • C) Histosols blanket river stonefields without peat decay
    • D) Bases recycle fast in shallow biotic layers while deep horizons stay leached and poor

    Answer: Bases recycle fast in shallow biotic layers while deep horizons stay leached and poor

    Explanation: Tropical Oxisols are heavily weathered with bases leached deep below the root zone; nutrients cycle rapidly through a thin organic surface layer, so burning or removing that layer exposes infertile subsoil.