... rain?
A) Back into rain forest
B) It is productive for a year before turning.
C) It remains fertile for decades and will yield large crops.
D) It is washed away by rain and exhaused by planting
... rain?
A) Back into rain forest
B) It is productive for a year before turning.
C) It remains fertile for decades and will yield large crops.
D) It is washed away by rain and exhaused by planting
It's a massively complicated question with a whole range of factors involved. Left untended, things will eventually return to a natural state (unless we go past the tipping point, which is like a balloon popping. Once a balloon has popped, it can never be a balloon any more).