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hardwood_stocking_charts [2012/04/05 19:17] ddrummond created |
hardwood_stocking_charts [2012/07/20 15:16] (current) 128.192.48.119 |
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| ====== Hardwood Stocking Charts ====== | ====== Hardwood Stocking Charts ====== | ||
| + | {{::hardwoodstocking1.jpg|}} | ||
| + | {{:hardwoodstocking2.jpg|}}\\ | ||
| + | Relation of basal area, number of trees, and average tree diameter to stocking percent for upland | ||
| + | central hardwoods. Tree-diameter range 7-15 (left), 3-7 (right). The area between curves A and B | ||
| + | indicates the range of stocking where trees can fully utilize the site. Curve C shows the lower | ||
| + | limit of stocking necessary to reach the B level in 10 years on average sites. (Average tree | ||
| + | diameter is the diameter of the tree of average basal area.) | ||
| + | |||
| + | ====Procedure for Using Hardwood Stocking Charts==== | ||
| + | - Use Prism to determine basal area on 5 to 10 sample points (or more if conditions are not uniform). | ||
| + | - Ate each sample point, count all trees 2 inches DBH and over- using 1/20th acre plot (26 1/3 ft. radius). | ||
| + | - Then, knowing the B.A. and the number of trees per acre, read the "average tree diameter" and the "stocking percent" directly from the charts. | ||
| + | - Next, follow down the line of "Average Tree Diameter" (parallel to the nearest LOWER average diameter line) to line B; then follow the horizontal line from this point to find what the basal area should be for the stand (at intersection with B.A. Axis). | ||
| + | ===Example=== | ||
| + | For a stand with B.A. of 90 and 220 trees per acre, the average DBH is about 8.7 inches and the stand is 81% stocked. The B-level B.A. is 65 and the C-level is 51. | ||
| + | |||
| + | if the B.A. of the stand exceeds C-level requirements, the stand is worth managing. If worth managing, deduct B-level B.A. from the total B.A. to find the sq.ft. that may be cut (25 sq. ft. for this stand). Let stand grow up to 85%-90% stocking, and thin | ||
| + | again to near the B-level.\\ | ||
| + | Foresters Field Handbook, North Carolina Forest Service, (Agriculture Handbook 355 Forest Service) | ||
hardwood_stocking_charts.1333653464.txt.gz · Last modified: 2012/04/05 19:17 by ddrummond
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