# soil (1-soil.org)

Soil is the loose material on the ground where plants grow. People talk about rich soil, dry soil, or soil that needs water. It is what farmers work with and what you dig in a garden.

## What a model may hear
- soil moisture data (environmental sensors and IoT): look for sensor readings, irrigation triggers, or drought alerts
- soil texture classification (agricultural science and GIS): apply USDA or FAO taxonomy like loam, clay, sand percentages
- soil carbon sequestration (climate modeling): treat it as a carbon sink variable in emissions calculations
- SOIL library or module (programming packages): search for a named library, possibly in R, Python, or specialized simulation software
- soil contamination threshold (environmental regulation): apply EPA or local standards for pollutants like lead or petroleum

## Where people and models part ways
- Says: "check the soil"
  Means: tell me if my garden dirt looks healthy
  May be taken as: query a database of soil sensor telemetry or run a soil analysis package
  Say instead: "describe my garden soil and tell me if it looks healthy for tomatoes"
- Says: "soil is bad here"
  Means: plants are not growing well in my yard
  May be taken as: flag a location as contaminated land in a regulatory database
  Say instead: "my yard plants are struggling and I think the dirt quality is poor"
- Says: "add soil"
  Means: I need to buy topsoil for my raised bed
  May be taken as: insert a soil data layer into a map or model
  Say instead: "recommend what kind of bagged topsoil to buy for a vegetable garden"
- Says: "soil type"
  Means: what kind of dirt do I have
  May be taken as: return a USDA soil survey polygon classification
  Say instead: "how can I tell what kind of garden soil I have by looking and feeling it"

## Tips
- say 'garden dirt' or 'yard dirt' if you mean home landscaping
- say 'farm soil' or 'field soil' if you mean agricultural land
- say 'soil data' or 'soil map' if you want scientific or geographic information
- say 'soil test' if you mean a lab analysis, not your own observation
- say 'potting mix' if you mean bagged product for containers, not ground soil

## Often confused with
- dirt: casual word for soil, less likely to trigger technical models
- earth: can mean ground, planet, or electrical ground
- ground: electrical or structural base, not living material
- land: property or terrain, not the growing medium itself
- compost: decomposed organic matter added to soil
- topsoil: specific layer or product, more commercial