Seed nets are a cheap and easy to fit.
A seed net prevents grass seeds from clogging your radiator core fins and consequential over heating. Many seldom used tracks have long grass growing between the tracks in summer. The seed from the long grass is knocked off by the bush bar or bumper and enters through the radiator grill, lodging in the radiator core fins.
When attaching a seed net, make sure that it covers past the bottom of the radiator, and not just the grill.
Always drive on existing tracks.