国家地理-2008-04-30 Farm Restoration 农场变湿地（在线收听）

Dale Aden has been farming most of his life, just like his father, and his father’s father.

"I am a third generation farmer on this land." His land is in Okabena, Minnesota, right along the Okabena creek, where for many years, Aden watched helplessly as the creek flooded its banks and soaked his crops.

"In wet years, this crop all drowns out. And when you lose your crop, it, basically it takes another five years to pay for that one, that one year that we have lost. 

After the losses took their toll, Aden had an epiphany of thoughts--why not stop farming the marginal land and set it aside for wildlife? "I thought it as a legacy, I would do this, put it back to where it should be better than where we found it.

Aden heard about a conservation program called Reinvest in Minnesota or RIM, that would pay him to return some of his farmland to its natural state. The RIM program encourages farmers to keep farming their productive land but sell the marginal land that’s susceptible to soil and water erosion.

Aden planted trees and shrubs. And here a friend is planting prairie grass that will soon provide cover for animals. "There, you see, she’s taking her head out of there." Aden also made dozens of birdhouses like this one for a pair of tree swallows that will soon get a lot more crowded when these eggs hatch. "They are community of 5 , 6 or 7. "

Aden broke drainage tiles and let his farmland return to wetland. "Up to about 3 years ago, this is all farmed. It's hard to believe now, but it was all farmed. Corn and soybean rotation as what it was across the road here it was the same way. 3 years ago it was all farmland."

Here’s a look at Aden’s crop a few years ago. Here’s that same spot today, a wetland with a thriving wildlife population. These days the sound of tractors on the Aden family farm has been replaced by a different sound. "As I call it music, I guess, wildlife music, is just wonderful to hear." And Aden is happy to sit back and listen. "I couldn’t be happier for the way it’s turned out."

epiphany:
A comprehension or perception of reality by means of a sudden intuitive realization