Crop rotation is already being preached. The hard part is getting many farmers to do it, because while output is stable, profit is most decidedly not, as prices and yields for each product will vary over time.
Most farmers will want to take shortcuts that promise the most yield and most profit from the least land in the shortest amount of time. Which means focusing on one crop or a simpler two crop rotation and using pesticides.
Just like many people will go the easy route and buy a big, gasoline-powered car to commute to a job twenty miles away instead of doing the logical thing and moving closer to work, commuting, biking, motorbiking or whatever.
|