Platforms
Which layer of soil is most likely of greatest importance to plant growth?a.O (organic matter)b.A (topsoil)c.B (subsoil)d.C (parent rock)
Soil is not directly important to animal life.
Soil is a mixture of _______.a.solidsb.solids, liquids, and gasesc.solids and liquidsd.solids and gases
Which of the following soil particle types is the largest?a.sandb.siltc.clayd.potassium
Which of the following factors does not affect soil formation?a.precipitationb.timec.erosiond.none of the above
Which of the following will be most influenced by the amount of organic material?a.soil colorb.soil texturec.soil structured.number of horizons
Which layer of soil is closest to the surface?a.O (organic matter)b.A (topsoil)c.B (subsoil)d.C (parent rock)
Soil horizons are defined by physical features.
Animals contribute to soil formation through decomposition of organic material.
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