[throw88888]

> Modern industrial agriculture relies heavily on two crops per year on the same land

Depends on how you define modern industrial agricilture I guess.

From https://en.m.wikipedia.org/wiki/Multiple_cropping

“However, only 5% of global rainfed cropland is under multiple cropping, while 40% of global irrigated cropland is under multiple cropping.”

Most farmland is rainfed. Only about ~20% is irrigated globally.

That means less than ~10% of all farmland globally is double-cropped.