TP122

Attributes in entity 2: LTEP 20-year tree plot location data set		Details
1. DBCODE Definition: Database Code TP122 Domain: enum
2. ENTITY Definition: Entity number (data table number) Units: number Domain: range (minimum = 2.  maximum = 2.)
3. TREEPLOTCODE Definition: Tree plot identifier with Experimental block (EXPBLOCK), Vegetation treatment (VEGTX), Organic matter treatment (OMATTERTX), and Grid point coordinates (GRID). Same as TREEPLOTTAG except without hyphens, spaces, or commas. Domain: place
4. TREEPLOTTAG Definition: Tree plot identifier with Experimental block (EXPBLOCK), Vegetation treatment (VEGTX), Organic matter treatment (OMATTERTX), and Grid point coordinates (GRID). Internal LTEP data sheet and database entry coding system. Domain: enum
5. EXPBLOCK Definition: Experimental block code system used internally on LTEP data sheets and in database entry Domain: enum
6. EXPBLOCK_NAME Definition: Experimental block name Domain: enum
7. VEGTX Definition: Vegetation treatment code system used internally on LTEP data sheets and in database entry Domain: enum
8. VEGTX_NAME Definition: Vegetation treatment Domain: enum
9. OMATTERTX Definition: Organic matter treatment code system used internally on LTEP data sheets and in database entry Domain: enum
10. OMATTERTX_NAME Definition: Organic matter treatment Domain: enum
11. XCOORD Definition: Grid point X-coordinate (meters along x-axis from SW tree plot corner) Units: meters Domain: range (minimum = 0.  maximum = 150.)
12. YCOORD Definition: Grid point Y-coordinate (meters along y-axis from SW tree plot corner) Units: meters Domain: range (minimum = 0.  maximum = 125.)
13. TREEPLOTNO_NOM Definition: Nominal pretreatment tree plot code; these codes (A-E) were used in 1992 (Blocks 1, 2, 3) and a few times in 1995 (three tree plots within Block B (codes 2, 4, 5)) to identify initial tree plot location within experimental unit (EXPUNIT). Domain: enum
14. TREEPLOTNO_PERM Definition: Permanent tree plot code; used in 1995 and beyond to identify permanent tree plot location within experimental unit (EXPUNIT). Plot codes were changed to numbers (1-5) in subsequent years but not all plots were included in future surveys. Domain: enum
15. PLOTAREA_EST Definition: Estimated tree plot area; in 1992 plots were initially intended to be 18x18m Units: square meters Domain: range (minimum = 324.00  maximum = 324.00)
16. PLOTAREA_EST_FLAG Definition: Non-numerical entries (nm) for estimated tree plot area (PLOTAREA_EST) Domain: enum
17. PLOTAREA_ACT Definition: Surveyed tree plot area; GPS was used to calculate actual tree plot area in 1995 and 1999 Units: number Domain: range (minimum = 260.44  maximum = 335.65)
18. PLOTAREA_ACT_FLAG Definition: Non-numerical entries (nm) for calculated tree plot areas (PLOTAREA_ACT) Domain: enum
19. TPERHA_EST Definition: Trees per hectare; 1992 estimate Units: number per hectare Domain: range (minimum = 30.86  maximum = 30.86)
20. TPERHA_EST_FLAG Definition: Non-numerical entries (nm) for estimated trees per hectare (TPERHA_EST) Domain: enum
21. TPERHA_ACT Definition: Calculation of the number of trees per hectare in 1995 and 1999; TPERHA=1/PLOTAREA/10000 Units: number per hectare Domain: range (minimum = 29.79  maximum = 38.40)
22. TPERHA_ACT_FLAG Definition: Non-numerical entries (nm) for calculated trees per hectare (TPERHA_ACT) Domain: enum
23. TPERACRE_EST Definition: Trees per acre; 1992 estimate Units: number per acre Domain: range (minimum = 12.49  maximum = 12.49)
24. TPERACRE_EST_FLAG Definition: Non-numerical entries (nm) for estimated trees per acre (TPERACRE_EST) Domain: enum
25. TPERACRE_ACT Definition: Calculation of the number of actual trees per acre in 1995 and 1999; TPERACRE=TPERHA*0.404685 Units: number per acre Domain: range (minimum = 12.06  maximum = 15.54)
26. TPERACRE_ACT_FLAG Definition: Non-numerical entries (nm) for actual trees per acre (TPERACRE_ACT) Domain: enum