She goes on to write that the new means of transport made it feasible for areas of relatively low population density to export their rich natural resources to larger markets. After the Industrial Revolution, some areas with low population densities underwent rapid technological change thanks to improved transport. Transport appears on the yardstick, not because it fattened the billfolds and brightened the lives of farmers. Transport appears because it carried the technology and the incentive to use it to raise yields and thus support more people per plot. Introductions also can be connected to supporting more people per plot.
Soybeans provide a reverse example.