Platforms
Where does the organic material in soil originate?a.physical weatheringb.chemical weatheringc.decomposing plant and animal matterd.the atmosphere
Humus creates good soil tilth, which is an indirect benefit of microorganism action.
Which of the following areas would most likely have the deepest layer of topsoil?a.desertb.beachc.grasslandd.mountaintop
Field patterns are the same in all parts of the world.
Contour farming is a method for plowing across the slope of steep hills.
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Ocean Exploration
Skills Lesson: Proposing Solutions
Topic Test