Explain the term levelling.What are the advantages of levelling?
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Levelling or leveling is a branch of surveying, the object of which is to establish or verify or measure the height of specified points relative to a datum. It is widely used in cartography to measure geodetic height, and in construction to measure height differences of construction artifacts.
the main benefits of levelling are:
improved crop establishment,
even water coverage of the field,
even crop stand and maturation,
reduction of weeds by up to 40 % (thereby a 75 % decrease of labour required for weeding),
increase of farming area by 5-7 %,
reduction of farm operation times by 10-15 %,
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