#$%^&*AU2016202568A120160728.pdf#####ABSTRACT A method to improve growth and/or productivity of a plant by the use of the exhaust emissions from the type of internal combustion engine found in an agricultural machine such as a tractor, mower, harvester, blower and the like, said method including directing said exhaust emissions towards said plant as said machine passes over said plant sufficient for said plant to absorb at least some of said emissions, wherein the method is performed whilst the plant is moistened or wetted by dew or spray irrigation. cALL14100 2016-04-21.docx