Forest Site
Standard Report Help
Site Index Standard Report
The standard report for site index displays selected plot data by plant species. For each plant species, the report displays the total number of plots, site index mean, site index range, and standard deviation. The plot data displayed can be limited by state, county, MLRA, or soil series. The data displayed in the standard report is limited to that shown in the following example:
| Soil Series |
NSPNS | Curve Num- ber |
Plot ID | Site Index |
# Trees |
Avg. Ht. |
Avg. Ht. |
Basal Area |
Precipitation | Elev. | Slope % |
Aspect | Soil Tex- ture |
Slope Posi- tion |
Drain- age Class |
Ero- sion Code |
||||
| Plot # |
Year | State | County | Ann- ual |
Sum- mer |
|||||||||||||||
| ADA | QUVE | 820 | 2 | 63 | 19 | 103 | 46 | 5 | 0.0 | 0.0 | 65 | 32 | 22 | 720 | 20 | 90 | CL | 1 | ||
| TOTAL NUMBER OF PLOTS | 1 | |||||||||||||||||||
| SITE INDEX MEAN | 46.0 | |||||||||||||||||||
| SITE INDEX RANGE | 46 - 46 | |||||||||||||||||||
| STANDARD DEVIATION (+/-) | 0.00 | |||||||||||||||||||
Soil Series
The name of the soil series where the plot is located or, if a series name has not been
established for the soil, the name of the family to which the soil belongs, followed by
the letter (F). Example: Holden (F).
NSPNS
The National Scientific Plant Name Symbol, as listed in
the National Plants Database (http://plants.usda.gov).
Site Index Curve Number
The code number for the site index curve (or table) used to derive the site index. For a
list of site index curve numbers, refer to the National Register of
Site Index Curves table.
Plot #
A number from 01 to 999. ThePlot # is unique for the year, state, and county in which the
plot data is recorded, i.e.duplicate Plot #'s are not allowed for plots located in the
same state and county for the same calendar year.
Year
The last two digits of the calendar year the plot was recorded.
State
The FIPS 2-digit numerical code for the state in which the plot is located.
County
The FIPS 3-digit numerical code for the county in which the plot is located.
Number of Trees
The number of trees used to calculate the site index.
Site Index
The average plot site index in whole numbers.
# Trees
The number of trees used to calculate the site index.
Avg. Age
The average age of trees used to calculate the site index.
Avg. Ht.
The average height of trees used to calculate the site index.
Basal Area
The basal area of the trees in the plot, in square feet.
Precipitation
Annual - The annual precipitation to the nearest whole inch.
Summer - The summer (warm season) precipitation to the nearest whole inch.
Elevation
The elevation of the site, in feet.
Slope Percent
The percent of slope in whole numbers, 0 to 99. 99 is used for all slopes steeper
than 99.
Aspect
The direction the slope faces, in degrees of azimuth from true north.
Soil Texture
The appropriate code (see table) representing the texture type of the soil where the site
is located.
Texture Type |
Code |
Texture Type |
Code |
| Clay | C | Sand | S |
| Clay loam | CL | Sandy clay | SC |
| Coarse sand | COS | Sandy clay loam | SCL |
| Coarse sandy loam | COSL | Silt | SI |
| Fine sand | FS | Silty clay | SIC |
| Fine sandy loam | FSL | Silty clay loam | SICL |
| Loam | L | Silt loam | SIL |
| Loamy coarse sand | LCOS | Sandy loam | SL |
| Loamy fine sand | LFS | Very fine sand | VFS |
| Loamy sand | LS | Very fine sandy loam | VFSL |
| Loamy very fine sand | LVFS |
Slope Position
A code (see table) representing the position on the slope where the site is located.
| Slope Position | Code | Slope Position | Code |
| Lower Slope | L | Middle Slope | M |
| Upper Slope | U | Noninfluencing | X |
Drainage Class
The code (see table) representing the drainage class of the site.
| Drainage Class | Code | Drainage Class | Code |
| Very Poorly Drained | 1 | Well Drained | 5 |
| Poorly Drained | 2 | Somewhat Excessively Drained | 6 |
| Somewhat Poorly Drained | 3 | Excessively Drained |
7 |
| Moderately Well Drained | 4 |
Ground Species Standard Report
The standard report for ground species displays selected ground species data by soil series. The plot data displayed can be limited by state, county, MLRA, or soil series. The data displayed in the standard report is limited to that shown in the following example:
| Soil Series | NSPNS | Percent of Total Plots with Species (Frequency) |
Average Abundance Rating |
Plant Index |
| TROUP | ANDR02 | 25 | 2 | 0.50 |
| TROUP | CHGR4 | 15 | 1 | 0.15 |
| TROUP | DESMO | 30 | 3 | 0.90 |
| TOTAL NUMBER OF PLOTS | 2 | |||
Soil Series
The name of the soil series where the plot is located or, if a series name has not been
established for the soil, the name of the family to which the soil belongs, followed
by the letter (F). Example: Holden (F).
NSPNS
The National Scientific Plant Name Symbol, as listed in
the National Plants Database (http://plants.usda.gov).
Percent of Total Plots with Species Column
The percent of plots in the soils series in which the plant occurs. For
example, if there are a total of 2 plots for a soils series and a plant occurs in only one
of the plots, then the frequency value is 50.
Average Abundance Rating Column
This value is derived by dividing the sum of the abundance ratings for a specific plant in
all plots on a soil series by the number of times that plant appears in the soil series.
For example, if there are a total of 5 plots for a soil series and the same plant
appears in two of the plots with an abundance rating of 2 in one plot and 4 in the other
plot, the average abundance rating is 2.
Plant Index Column
This value is derived by multiplying the percent frequency times the average abundance
rating. For example, if a plant has a frequency of 67% and an average abundance
rating of 3, the plant index is 3 x .67 = 2.0 (rounded).