विधियों की तुलना करें
चुनी हुई विधियों की आमने-सामने समीक्षा करें; भिन्नता वाली पंक्तियाँ रेखांकित हैं।
| स्टैंड घनत्व सूचकांक× | साइट इंडेक्स वक्र (Site Index Curve)× | |
|---|---|---|
| क्षेत्र | वानिकी | वानिकी |
| परिवार | Process / pipeline | Process / pipeline |
| उद्भव वर्ष≠ | 1933 | 1954 |
| प्रवर्तक≠ | Louis Reineke | Joseph Westveld |
| प्रकार≠ | density measurement | productivity index |
| मौलिक स्रोत≠ | Reineke, L. H. (1933). Perfecting a stand-density index for even-aged forests. Journal of Agricultural Research, 46(7), 627–638. link ↗ | Clutter, J. L., Fortson, J. C., Pienaar, L. V., Brister, G. H., & Bailey, R. L. (1983). Timber Management: A Quantitative Approach. John Wiley & Sons. link ↗ |
| उपनाम | SDI, Reineke density index | site productivity, growth intercept |
| संबंधित≠ | 2 | 1 |
| सारांश≠ | The Stand Density Index (SDI), introduced by Reineke in 1933, is a dimensionless measure of forest density that accounts for both tree number and size. It expresses the number of trees per hectare in a stand, adjusted to a reference quadratic mean diameter (QMD) of 25 cm, providing a standardized metric for comparing tree density across different forest types and sizes. SDI is widely used in forest management to assess stocking levels and to guide thinning decisions. | A site index curve is a family of curves relating tree height to stand age, used to quantify the productivity of a forest site. Site index is conventionally defined as the height of dominant trees at a reference age (typically 50 years in temperate forests). These curves enable foresters to classify sites by productivity class and to predict growth rates for planning timber harvests and silvicultural treatments. Site index curves are among the most fundamental tools in forest growth and yield modeling. |
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