Posted 3/12/2016 06:26 (#5170725 - in reply to #5168942) Subject: RE: Fertilizer units vs pounds ??s
And P is just short slang for p2o5, and K for k2o. There is never any communication, products or soil samples in elemental numbers. n-p-k = n- p2o5-k2o. people just get tired of writing it out.