Passage Summary: Farmers used to use more fertilizer to grow more food, but now they are using less fertilizer even though they still want to grow more food.

Reasoning: Historically, increased fertilizer use led to doubled productivity, and while farmers still want to increase productivity, fertilizer use has actually decreased since 1985.

Analysis: The paradox here lies in the reversal of a long-standing trend: if fertilizer was the engine of productivity for decades, why would its use drop while the desire for productivity remains high? We need a piece of information that explains how farmers can pursue higher yields while simultaneously cutting back on fertilizer. Perhaps there is a more efficient way to apply it, or maybe a different technology has taken its place. Look for an answer that provides a reason why the historical correlation between fertilizer volume and productivity no longer holds true.