Soil

Urban Farm DB summary

Soil is a complex three-phase system of minerals, organic matter, gases, water, and organisms that supports plant growth and soil life. A typical soil is about 50% solids (45% mineral, 5% organic matter) and 50% pore space, with microbial density around 10^8 organisms per gram and pore-space CO2 concentrations 10 to 100 times atmospheric levels.

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.

• 50 %

  solid fraction(soil composition)

  Soil

  region

  Global

  year

  null

  method

  typical soil composition

• 1.1–1.6 g_per_cm3

  dry bulk density(soil bulk density)

  Soil

  region

  Global

  year

  null

  method

  typical range for most soils

• 100,000,000 organisms_per_g

  prokaryotic density(soil microbes)

  Biodiversity

  region

  Global

  year

  null

  method

  mean prokaryotic density

• 10–100 x_atmospheric↑ Increase

  co2 concentration multiple(soil pore gas)

  SoilControl: atmospheric CO2 concentration (0.04%)

  region

  Global

  year

  null

  method

  soil pore space measurement