Terra preta

Urban Farm DB summary

A Wikipedia article on terra preta, a fertile anthropogenic dark soil found across the Amazon Basin, formed between 450 BCE and 950 CE and rich in low-temperature charcoal and pottery shards. It notes black carbon content reaching up to 9% (versus 0.5% in surrounding soils), depths of up to 2 meters, a regeneration rate of about 1 centimeter per year, an estimated coverage of 0.1-0.3% (6,300 to 18,900 square kilometres) of the Amazon Basin, and modern biochar-based attempts to recreate it.

Only numbers and their conditions are stored, as structured data — never the source's own sentences. Metric and condition names stay in English, as coded.

• 9 %↑ Increase

  black carbon content(terra preta)

  SoilControl: surrounding soils (0.5%)

  region

  Amazon Basin

• 2 meters

  layer depth(terra preta)

  Soil

  region

  Amazon Basin

• 1 cm_per_year

  regeneration rate(terra preta)

  Soil

  region

  Amazon Basin

• 6,300–18,900 km2

  distribution area(terra preta)

  Soil

  region

  Amazon Basin