soil sample
A soil sample is a portion of earth collected for analysis—testing nutrient content, contamination levels, pH, or composition.
Farmers take soil samples to determine fertilizer needs; environmental scientists collect them to assess pollution.
The lab results from the soil sample showed elevated lead levels.
- soil testspH test, pH testing, lead test, lead testing, lab analysis
- Marsred planet, Mars surface, Martian atmosphere, Olympus Mons, polar caps
- Samplesfabric swatch, paint swatch, specimen, swab, smear
- specimensspecimen, fossil, mineral, crystal, geode
- soil sciencetopsoil, subsoil, clay, sand, silt
- archaeologyexcavation, dig site, archaeologist, dig, archaeological digs