Back in 2004 there was research done in relation to the effects of tire pressure on soil compaction and resulting plant growth, now in 2020 AGCO repeated the study in hopes of confirming the results. The test involved three sets of tires over the course of a growing season, the control was a basic set of full tires, then there were two degrees of deflated tires one at 55 psi and another at 15 psi.
The results of the 2020 study showed a similar result, the tires with the lowest psi caused the least soil compaction and allowed for the best growth of roots and crops among rows affected by vehicle tires.
The conclusion being made is that the use of flattened tires allows the force to dissipate over a larger area making the compaction shallow over a bigger area letting roots grow more effectively. The effects of the study were measured by crop height in the affected areas, on average there was a 5-10-inch difference in plant height encouraging farms to let their air out.
Consider deflating your tractor and equipment as part of your soil and plant health strategies.