Comment False Alarm from the Title... (Score 1) 140
At first glance one might think this study was truly significant, but look a bit deeper:
It seems to be saying that 20% of the world's farmland might have areas where the heavy machinery passes over some areas (20%?), that are then less productive due to compressed soil (20%?). That sounds like a more realistic estimate of the importance of this research might be 20%*20%*20% = 0.8%.
* I learned to think twice about headlines with my own PhD thesis (which used similar trickery).