Agri News, MN 08-15-06 Iowa news and notes Manure applicators must be certified DES MOINES -- Manure applicators who haul or handle manure from a confinement site facility with more than 500 animal units and commercial manure applicators are required by Iowa law to be certified to apply manure in the state. Confinement site applicators must attend two hours of annual training to maintain their three-year license. Applicators must pay certification and education fees. "We estimate that nearly 400 confinement site applicators still need to attend training this year prior to land application to meet their yearly training requirements,'' said Angie Rieck-Hinz, Iowa State University Extension program specialist.