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).
Test your soil's pH level to determine if lime is needed. A pH test measures the soil's alkalinity or acidity. When the pH is above 7.0, the soil is said to be alkaline; when below 7.0, it is acidic. A pH level of 6 to 7 is ideal for most grasses. If your soil is too acidic, use a lime application.1  Bring a soil sample to a government or independent soil testing laboratory for the most complete testing results. 2  You can use a self-test kit or pH probe, sold at garden centers, to test your soil. You can use a self-test kit or pH probe, sold at garden centers, to test your soil. 2  The pH level indicated by these tests may show a need for, but do not often tell you how much lime is needed.