029.JPG : 無料・フリー素材/写真
029.JPG / The Cornell IPM Image Gallery
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Safer Turf for Safer Schools: Any turfgrass manager will confirm — sometimes the most damaging pests are people. When this school rented space to an outside agency, the school was told 1,000 people would come to the school for exams. Thinking this meant 500 people in the morning, 500 in the afternoon, they knew their parking lot could fit that many cars. But when 1,000 people showed up at once, someone started directing cars onto athletic fields just thawing from a cold winter.A playfield turned to muck is a magnet for weeds (and technically, weeds are pests). Luckily a local company donated the equipment to renovate the field, because weeds make for slick footing — which in turn makes for sports injuries. Which is why these fields stayed closed until the grass was ship-shape again.Photo: Joellen Lampman |
| 撮影日 | 2014-03-26 15:07:53 |
| 撮影者 | The Cornell IPM Image Gallery , New York, USA |
| タグ | |
| 撮影地 | |
| カメラ | Canon EOS DIGITAL REBEL XT , Canon |
| 露出 | 0.001 sec (1/800) |
| 開放F値 | f/4.0 |
| 焦点距離 | 18 mm |