Risk of incorrect pressure in agricultural tires

Tanja Folnovic

To ensure the quality of farming and preservation of your land, right pressure in tires is crutial. Over inflated pressure in tires results in yield loss, lower quality results and excess operating costs. Root development of the crops planted is adversely affected, development of microbial life is limited and stagnation of water is encouraged. Also it comes to excessive spin and high resistance to forward movement due to the “step” effect, caused by ruts. All that results in excess fuel consumption, time wasted and wear on machine and tires and other losses in farm management. Incrorect pressure may affects your comfort (verinflation causes bouncing and vibration, underinflation causes power handling) and your agricultural tires. In table below are sown some effects of incorect tire pressure:
Pressure too high Pressure too low
Excessive soil compaction Risk for tire casing durability
Extensive rut formation Rotation on wheel rim
Excessive spin (overconsumption) Irregular wear on roads
Fast, irregular wear on roads Overconsumption on roads
High risk of tearing tread blocks Vehicle instability
Uncomfortable ride
The right pressure means an optimum soil contact and therefore a larger footprint which causes spin and penetration to be reduced. To calculate the right pressure there're four criterias:
  1. The sizes of tires and their charateristics (load and speed index)
  2. The maximum speed at which you use your machines
  3. The total weight supported by your tires – machine weight+ weight of tools+ load transfer
  4. Operating use: cyclical or non-cyclical

Use this formula to calculate tire pressure

A = B * (C / D) ^ 1.25

A= the tire pressure you want to know B= the maximum tire pressure, which you can find on the tire C= The actual weight on the tire D= the maximum load for the tire, also can be found on the tire in lbs, kg, or load-index