This product is an on board nitrogen generator. Most companies purchase nitrogen in cylinders at about 2000 p.s.i. We at Pit Crew Tire Service have chosen to invest in a system that will create nitrogen on demand and store it in an on-board 80 gal storage tank at low pressure. (170 p.s.i. for safety concerns) The USA trails European tire technology by about 10 years.
The pH scale indicates acidity or alkalinity. A soil with a pH number below 7 is acid, while one with a pH above 7 is alkaline. Garden plants typically grow best in neutral or slightly acid soil (pH 7 or slightly below; see illustration at left).
This is especially true for acid loving plants like azaleas, camellias, loropetalum, blueberries, and centipede lawns which grow best when the pH is around 5.0-5.5. How to Tell if Your Soil Needs Lime. The only accurate way to know if your lawn or garden needs lime is to have the soil tested. Soil test kits can be purchased at garden centers or online, but they do not provide accurate results or tell you how much lime you need to add.