If a pitch sounds lower than it should, what is the term we use to describe that sound?
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Contour farming. Contour farming is one of the most commonly used agronomic measures for soil and water conservation in hilly agro-ecosystems and sloppy lands. ... In both situations, it reduces soil erosion, conserves soil fertility and moisture, and thus improves overall crop productivity.
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Any sound with a frequency below the audible range of hearing (i.e., less than 20 Hz) is known as an infrasound and any sound with a frequency above the audible range of hearing (i.e., more than 20 000 Hz) is known as an ultrasound.
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