Share Content Published October 18, 2007 ©Si Barber. Moral rights asserted Mandatory Credit: ? Si Barber/07739 472 922 Crop spraying arable land in Norfolk, UK aestivum ag agribusiness agrichemical agriculture agropyron application chemical control couch crop ear elymus farming glyphosate grass herbicide insecticide land nitrate norfolk pesticide repens ripe roundup seed soil spray spraying tractor triticum twitch uk weed weeds wheat