A preform production apparatus for precision press molding, which is downsized but can produce preforms at a lower cost, and a production method thereof using the apparatus are provided. A retention barb on the tab slides along a ramp to engage with a receptacle within the slot. The third and the fourth circuits pull out excess current components from the first and the second terminals, respectively, so that the first and the second currents become equal to each other. Further, the agricultural sunscreen formulation and the second agricultural chemical may be applied to the crop at or near the same time. The user follows the instructions, and pours the contents into the reservoir bowl, and then adds ice to the reservoir bowl.