1. On younger substrates, especially of volcanic origin, tropical soils may be quite fertile. 2. Oxisols, deeply weathered tropical soils , have a rich fossil record from the Paleoproterozoic onwards. 3. This holds especially true for highly weathered tropical soils . 4. Until recently, for example, soybeans were not thought to flourish in tropical soils and climates. 5. Approximately a third of all tropical soils are too acidic to support traditional food crops. 6. There's no production of coca in the border area because coca doesn't grow in tropical soil . 7. Influence of oxic / anoxic fluctuations on ammonia oxidizers and nitrification potential in a wet tropical soil . 8. Stonelayers occupy the base of biomantles in many, if not most, tropical soils and in many midlatitude soils. 9. Human activity is thought to account for 30 %; tropical soils and oceanic release account for 70 %. 10. Due to the low P availability in tropical soils this application would be especially useful in the tropics.
