Modifiers matching soil:

• particulate,
• sterile,
• unstable,
• heavy,
• textured,
• wet,
• gritty,
• visible,
• moving,
• saturated,
• heavier,
• soft,
• unconsolidated,
• stubborn,
• permeable,
• frictional,
• humid,
• coarse,
• compact,
• loose,
• organic,
• cohesive,
• sandy,
• free,
• clean,
• damp,
• compressible,
• fine,
• outdoor,
• hard,
• infertile,
• impermeable,
• poor,
• marine,
• sedimentary,
• light,
• chalky,
• softer,
• absorbent,
• nonconductive,
• complex,
• colored,
• rich,
• everyday,
• lipophilic,
• structured,
• active,
• solid,
• lighter,
• packed,
• porous,
• tough,
• dense,
• industrial,
• medium,
• hydrophilic,
• ordinary,
• nutrient,
• bad,
• spongy,
• weak,
• insoluble,
• leafy,
• red,
• tillable,
• toxic,
• difficult,
• friable,
• irregular,
• granular,
• stable,
• alluvial,
• conductive,
• expansive,
• local,
• particular,
• sensitive,
• aggregate,
• indigenous,
• lightweight,
• alkaline,
• tight,
• oily,
• mild,
• moist,
• acidic,
• dispersive,
• basic,
• natural,
• pervious,
• residual,
• soluble,
• surficial,
• common,
• stony,
• impervious,
• standard,
• dry,
• soggy,
• subsurface,
• overlying,
• unwanted,
• fitting,
• nonpolar,
• strong,
• thick,
• sticky,
• heterogeneous,
• inert,
• mixed,
• resistant,
• finer,
• size,
• plastic,
• hydrophobic,
• firm,
• typical,
• inorganic,

Simple categories matching nonpolar:

• fuel,
• solvent,
• substrate,
• system,
• gas,
• group,
• oil,
• drug,
• contaminant,
• substance,
• residue,
• polymer,
• stream,
• material,
• solute,
• contamination,
• fluid,
• resin,
• constituent,
• semiconductor,
• lipid,
• molecule,
• hydrocarbon,
• chemical,
• plastic,
• protein,
• portion,
• wax,
• component,
• compound,
• liquid,
• monomer,
• atom,
• impurity,
• lubricant,
• elastomer,
• metabolite,
• soil,
• surface,
• medium,