I have a 16/31 planter with a John Blue pump, the JD rate chart gives what color of orifice to use with pump settings for both high and low speed. I am wanting to apply fertilizer in the furrow with Keaton firmer and use Teejet numbered orifice to control the rate. Which Teejet orifice is the same as the John Deere yellow 1.2 orifice? Wilson