Livestock production : 無料・フリー素材/写真
Livestock production / eutrophication&hypoxia
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Confined cattle feeding operation in a ranch in California. During the next decade, beef trade is expected to grow at an average of 3.5% per year ultimately reaching 8.8 million metric tons by the year 2016. It is estimated that only 20% of the nutrients used in livestock production is actually consumed by humans. The remainder is excreted as manure or lost to the environment during the production of animal feed. Photo Credit: U.S Department of Agriculture |
| 撮影日 | 2010-12-10 13:23:20 |
| 撮影者 | eutrophication&hypoxia |
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