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).
(If you donât have any on hand, you can buy a bottle from almost any grocery store or pharmacy.) As the hole you created in the soil turns into a muddy pool, insert the test probe. Now wait. After about a minute, you should get a reading. If the pH registers as being lower than 7, that means your soil is acidic.