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burn-off
burn-off n. 
/ˈbərnˌɑf/ (cf.burn v.1 13f).
Brit. /ˈbəːnɒf/
, /ˈbəːnɒf/U.S. /ˈbərnˌɔf/
, /ˈbərnˌɔf//ˈbərnˌɑf/ΘΚΠ
the world > food and drink > farming > cultivation or tillage > reclamation > [noun] > clearing land > burning off refuse
burrow1602
denshiring1607
burning1669
burn-baking1769
burn1792
burning off1800
burnbeating1808
stifle-burning1844
burn-off1861
bush burn1861
bush-burning1898
slash-burning1919
1861 W. Morgan Jrnl. 27 Feb. (1963) iii. 28 Not an over excellent burn off—there having been of late a good deal of wet.
1869 J. May Guide to Farming in N.Z. 18 In due time we fired it [the bush], and had the satisfaction of having a clean burn-off.
1933 Bulletin (Sydney) 6 Dec. 28/2 A good burn-off gets rid of a lot of rubbish in the form of insects and other pests, but it also destroys the organic matter (i.e., humus) without which no soil can be cropped successfully.
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