Irrigation is most efficient when water is delivered directly to a crop's target root zone.
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The Moment Magnitude scale is used to measure the strength of earthquakes, increases by a factor of 10.
Different units of measurement have been used to measure things in the past.
The maths of networks is used to calculate times, distances and patterns of movement.
Join BJ and Dion from Science Time, as they talk all about 'Sun and Moon'.
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