A planter system (112) for planting seeds and spraying fluid includes a seeder assembly (152) including a seed tube (158), a seed meter (156) configured to dispense a seed into the seed tube (158), and a conveyor apparatus configured to carry the seed through the seed tube. The planter system (112) also includes a sensor (250) configured to transmit a detection signal upon detection of the seed passing a detection location. The planter system (112) also includes a control system (226) configured to determine a travel time of the seed from the detection location to a furrow based on a baseline drop time for the seed, a baseline travel speed of the seeder assembly, and an operating travel speed of the seeder assembly. The control system (226) is configured to transmit a control signal to a valve (222) coupled to a nozzle assembly (218) based on the travel time and the detection signal to spray the fluid on or adjacent the seed.
