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from article Oats
Crown rust on oat leaves. This devastating disease is caused by Puccinia coronata. (Photo courtesy of the USDA Agricultural Research Service)
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from article Oats
Stem rust infection (caused by Puccinia graminis) on oat stems. (Photo by Howard F. Schwartz, Colorado State University)
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from article Agronomy
Relationship of agronomy to basic sciences, related fields, and practical farming methods.
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from article Forest ecosystem
Forest in Moran State Park on Orcas Island, Washington. (Credit: Chris Willig)
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from article Forest ecosystem
Forest fire in No Name Creek area of Colorado. (Credit: Andrea Booher/FEMA)
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from article Forest ecosystem
Puma and cub in forest. (Credit: Grant Faint/Stockbyte/Getty Images)
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from article Forest ecosystem
Conceptual model of elemental cycling in a terrestial ecosystem, emphasizing the presence and activities of arthropod consumers. The indirect regulation of elemental movement by arthropods is indicated by the hourglass-shaped valves on these flows.…
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from article Forest ecosystem
The southern pine beetle (Dendroctonus frontalis) is a destructive insect pest of coniferous forests in the southern United States. (Credit: U.S. Forest Service)
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from article Forest ecosystem
Belowground food web. (Credit: Elaine Ingham)
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from article Beef cattle production
Angus bull with overall carcass merit. (Credit: Jim Koch/Agricultural Research Service, U.S. Department of Agriculture)
