It shouldn't come as a surprise that when food is produced with the primary goal of obtaining maximum yields, you're going to sacrifice some degree of quality. If everyone in the Netherlands asked Van Gogh to paint 'Starry Night' for them, we would not have the priceless piece of art we so value today. You see, that's what happens when you attempt to mass produce something. You have to cut corners to meet demand. You try to get away with less time and other inputs for the highest possible net gain. You lose sight of the main purpose of what you are doing.
This applies to almost every scenario you can think of, and large-scale farming is no exception. This study from The Organic Center shows that we are consuming higher amounts of empty calories from foods with lower levels of nutrients, all in the interest of higher yields.
The solution lies in restoring our nation's network of small farms. Pay close attention to the farm bill that is now working its way through the Senate. The current bill will expire at the end of this month, and word through the grapevine is that we'll see little more than an extension of a system that has already proven to be a failure in many respects.