Chemical fertilizer has tripled in price in the past year. And farmers are returning to the old ways: spreading manure on their fields instead of treating it as a worthless byproduct.
Some farmers are finding they can make more profit using their beef cattle to produce manure than they'd make on their meat; others are looking for new ways to maximize the "output" of their livestock, including investing in expensive equipment to capture methane in a chicken house.
Meanwhile, the growing ranks of organic produce farmers are suddenly finding that their manure suppliers will no longer supply them.
New Hampshire Public Radio's Dan Gorenstein reports.