I have a client who supplied me with a soil test done for their lawn (fescue grass and lots of sand burrs - full sun). The property is 2.5 acres and very sandy (notice that with the Ca/Mg ratio thats about 12:1) The sand burrs are a indication the soil has vertually ZERO nutrional value so these P and K #'s are from fert sitting in the soil (I would think) But P looks low to OK in Lawn. K looks OK? CEC is low in lawn and OM is not tested but he said before it was less than 1% which sucks. Fescue Lawn C.E.C 11.7 soil pH 7.3 Lime Index70 P lbs/ac 185 K lbs/ac 150 Ca Lbs/ac4060 Mg lbs/ac324 Ca sat'n 87% Mg sat'n 11% K sat'n 2% Base sat'n100% Ca/Mg 7.5 Mg/K 7 No N#'s weird? I'm going to innoculate seed with mycorrhizae - seed at 6# per 1000 sq ft cover with compost (1 yard per 2500 sq ft) and 10# humus per 1000 sq ft regardless of any other inputs it might also need. If it is all sand it for sure need some priming of the pump and seed to get it moving.