USDA Forest Service
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The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run." |
| 6 Images of 4 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 1241636 | drought | Under extreme drought conditions, even mature trees can be severely damaged. This tree had shed older needles first but as the drought continued, the terminal and branch tips have died back. Crown thinning due to drought is typically nonuniform as seen here. | |
| 1241637 | drought | This sapling exhibits symptoms of chronic drought; thin crown, short needles, and short terminal growth. | |
| 1241647 | chemicals | Douglas-fir damaged several miles downwind from release site of chloring gas. Outer foliage was killed and shed within two weeks of exposure. | |
| 1241648 | chemicals | Trees of several species died after calcium chloride dust abatement was applied to the road. | |
| 1241756 | sunscald | Sunscald is seen on the south side of thin-barked trees. | |
| 1241757 | mechanical | Fresh mechanical wound with resin. The bark was torn away and the wood gouged during logging. Frayed wood and bark are evidnece of mechanical injury. |
