the world > food and drink > farming > cultivation or tillage > reclamation > [noun] > clearing land > weeding or weed control > weed killer (2)
Any of various chemicals used in agriculture, such as fertilizers or (now more commonly) biologically active compounds such as pesticides…
A non-selective systemic herbicide, particularly effective against perennial weeds, and used (in solution or as the isopropylamine salt) in various…