an agricultural sprayer unit to be moved by a moving vehicle relative to crops to be sprayed with a chemical agent delivered from said agricultural spray unit includes : a frame connectable to said moving vehicle for connecting said agricultural sprayer unit to said moving vehicle for moving along with said moving vehicle , a tank supported by said frame for storing said chemical agent , a boom linked to and extending from said frame defining a specific orientation relative to said crops , a nozzle supported by and positioned along said boom and communicating with said tank for receiving said chemical agent from said tank for generating an atomized jet of said chemical agent to be expelled from said nozzle and sprayed onto said crops , and air - flow generating apparatus supported by said frame and extending along said boom for generating an air flow directed from said air - flow generating apparatus to said crops , said air flow generating apparatus being divided into a number of subsections positioned along said boom , each subsection including a set of individual air outlets for generating a specific air distribution pattern by said individual air outlets relative to said atomized jet of said chemical agent , and said specific air distribution patterns generated by said subsections together defining said air flow directed to crops .