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