soil samples
Soil samples are portions of earth collected for analysis—testing composition, contamination, nutrients, or moisture content.
Farmers take soil samples to determine fertilizer needs; environmental scientists collect them to assess pollution levels.
The soil samples showed elevated lead levels near the old factory.
The term appears frequently in agriculture, construction, and environmental science.
- Marsred planet, Mars surface, Martian atmosphere, Olympus Mons, polar caps
- field notesnotebook, observations, notes, sketches, entries
- geology exhibitsrock collections, volcanic rocks, metamorphic rocks, sedimentary rocks, petrified wood
- research samplessurvey data, control groups, data points, respondents, participants
- soil sciencetopsoil, subsoil, clay, sand, silt
- biospecimensspecimens, cells, tissue, blood, plasma