Last September, several hundred tomato lovers gathered on a sunny, breezy day in Portland, Ore. for Tomato Fest. Agricultural researcher Matt Davis was handing out samples of experimental tomatoes which were dry-farmed.
Dry-farming, a form of agriculture that doesn’t require irrigation, has roots stretching back millennia. But in the 20th century, the practice largely fell out of widespread use. Today, however, farmers are once again experimenting with dry farming as they struggle with water shortages, which are being exacerbated by rising temperatures and more frequent and intense droughts linked to climate change.
It’s a common misconception that dry farming means growing plants without water. Instead, dry-farmed plants take up moisture stored in the ground rather than sprinkled (洒) from above. Thus, sites must generally receive more than 50 centimeters of annual precipitation (降水量) to create moisture in the soil, and the soil must be composed of fine grains that help preserve that water over time.
Dry-farming won’t solve all of agriculture’s woes, but it offers a way forward. Farmers have noticed that dry-farmed plots contain only about a fifth of the weeds that grow in irrigated plots. Not having to pull up as many weeds can translate into labor savings. Coupled with not having to manage irrigation facilities, dry-farming can simplify a growing operation.
In 2016 and 2017, Alex Stone and Jennifer Wetzel from Oregon State University grew different varieties of winter squash in Corvallis. The pair irrigated some vegetable fields and dry-farmed others. After harvesting the squash and leaving them in storage for four months, they found that about 80% of the roughly 1,250 dry-farmed winter squash were still marketable while the number dropped to 50% out of the roughly 1,150 irrigated winter squash.
“You get to really learn what the environment gives you, and you learn to respond accordingly.” Michael Johnson, a specialist at the University of Arizona says, “A relationship develops between the cropping system and the farmer. It’s a beautiful thing that needs to be cherished.”
【小题1】What does the underlined word “exacerbated” in Paragraph 2 probably mean?| A．Highlighted. | B．Worsened. | C．Relieved. | D．Improved. |
| A．It helps grow plants without water. |
| B．It enjoyed great popularity in the 20th century. |
| C．It has certain requirements for the composition of soil. |
| D．It is an effective method to address environmental problems. |
| A．Its produce contains less water. | B．Its overall yields tend to be higher. |
| C．It makes the growing process simpler. | D．It tends to yield longer-preserved produce. |
| A．Conservative. | B．Indifferent. | C．Supportive. | D．Skeptical. |
