I just got back 3 soil test I sent off. It was from a yard that was hydroseeded about a year ago. The first one was a soil crust that had formed all over most of the yard about 1/4" thick. Here are the results P = 7lbs/A K = 108lbs/A Mg = 52 lbs/A Ca = 231lbs/A pH = 5.0 Buffer pH = 7.8 CEC = 2.5 The Second sample was of the soil excluding the crust P = 5lbs/A K = 40lbsA Mg = 17lbs/A Ca = 115lbs/A pH = 4.8 Buffer pH = 7.75 CEC = 2.4 And the third was of the soil and the crust sampled together P = 5lbs/A K = 60 lbs/A Mg = 33lbs/A Ca = 189lbs/A ph = 5 Buffer pH = 7.8 CEC = 2.5 I am fine w/ the pH, buffer and CEC, But what I find confusing is that in the top 1/4 inch of soil there is double the calcium and triple the magnesium In the top 1/4" the Ca/Mg ratio is 1:4.4 and in the regular soil w/o the soil crust is 1:6.7 Potassium is more than 2 and a half times higher in the soil crust than in the regular soil. Could this hydroseeding mix have caused this issue? What element or elements or ratios there of, are causing the soil crust to form?