by Connie Oswald Stofko The Amazon basin in general has poor soil, but it has some areas with amazingly fertile soil. Those fertile soils were created thousands of years ago by people using slash-and-burn agriculture. What was left behind from the burned plant material created the soil called terra preta, or black earth. And that soil, thousands of years later, can still be farmed today. Now we’re trying to replicate those fertile soils by using biochar, a kind of charcoal…
