A chemical distribution system includes an irrigation unit that has a distribution pipe and a pump fluidly coupled to the distribution pipe. The pump urges a liquid through the distribution pipe and the irrigation unit delivers the fluid onto a plant crop. An injector is fluidly attached to the irrigation unit and the injector contains a chemical. The injector is oriented such that the chemical is gravity fed into the irrigation unit. The injector releases the chemical into the fluid urged by the pump such that the chemical and fluid mixture is delivered onto the plant crop.