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).
Adding ground lime to your soil will make it more alkaline and aluminium sulfate or sulfur will help to make your soil more acidic. If your soil is low in nutrients (like sandy soil), try supply it with organic matter such as compost and manure to enrich the soil and improve its texture. Use organic mulches such as straw, dried grass clippings and deciduous leaves.