A unit of surface area (symbol ha) equal to 100 ares (that is, 10,000 square metres, one hundredth of a square kilometre, or approximately 2.5 acres), used for measuring the areas of geographical features such as land and bodies of water. (noun)
Examples of word hectare
By the way I understand, probably incorrectly, that the use of hectarea instead of hectare is a Mexican idiosyncracy.
But by using the high-yielding varieties, fertilizing heavily, sowing at the right time, and managing the fields properly, the same farmer can now harvest five tons of wheat and seven tons of rice per hectare from the same land, a total of twelve metric tons of food grain per hectare per year, as contrasted with the two and a half tons which he obtained with the old varieties and methods.
This year, Afghan poppies yielded 56 kg of opium per hectare, which is a 15 percent increase over 2008 and five times more than what opium farmers yield in the Golden Triangle of South-east Asia.