My county agaent says I need 100lbs per acre of this stuff according to my soil sample results. YIKES! $840 a ton. Isn't the last number potash? We are getting ready to spread 200 lb of lime per acre. Will that change my fertilizer needs? I'd really like a better priced solution if anyone actually understands all this mumbojumbo of numbers. My neighbor suggested 19-19-19. A guy at work says he always spreads 10-10-10. Me, I'm confused. Help please.