1) What is Humus? a) Mostly organic matter, such as decomposing leaves. b) Small rock particles, slightly larger than clay and can easily transported by wind and water 2) What is the top layer of soil called? a) Bedrock b) Subsoil c) Topsoil d) Clay 3) Which type of soil is best for growing crops? a) Sandy soil b) Clay soil c) Loamy soil d) Gravel 4) Which soil particle is the largest in size? a) Clay b) Silt c) Humus d) Sand 5) Soil pH measures the concentration of which ions in the soil? a) Sodium ions (Na+) b) Hydrogen ions (H+) c) Phosphate ions (PO₄³⁻) d) Chloride ions (Cl⁻) 6) Which soil texture is best for aeration but has poor water-holding capacity? a) Sand b) Clay c) Silt d) Loam

Soil Recap

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