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).
Add vinegar to one container and baking soda and water to the other, seeing which one fizzes. If it fizzes for vinegar, it's basic or alkaline; if it fizzes for baking soda, it's acidic. Buy a home testing kit. A home testing kit should be able to tell you your soil pH by giving you a number.