| Inventory Summary for Region 3 New Mexico National Forests | ||||||||||||
| Interior West Forest Inventory and Analysis (IWFIA) Program | ||||||||||||
| USDA Forest Service, Rocky Mountain Research Station, Ogden, Utah | ||||||||||||
| This reference is based on Region 3 New Mexico National Forest inventories conducted from 1993 to 2000. National Forests are inventoried according to administrative boundaries. | ||||||||||||
| Refer to terminology and field manual for supplemental documentation and term definitions. | ||||||||||||
| Number of field plots* and (condition proportions)** sampled by land type: | Number of field plots*** not sampled: | |||||||||||
| Forest and | Denied | |||||||||||
| National Forest | Survey Date**** | Forest | Nonforest | Nonforest | Inaccessible | access | Other | Total | ||||
| 191 | 23 | 20 | 1 | 0 | 0 | 235 | ||||||
| Carson | 1998-1999 | (202.7) | (31.3) | -- | -- | -- | -- | (234.0) | ||||
| (1998) | (t=130.0; w=72.7) | -- | -- | -- | -- | -- | (202.7) | |||||
| 198 | 44 | 24 | 2 | 0 | 0 | 268 | ||||||
| Cibola | 1997,2000 | (212.5) | (53.5) | -- | -- | -- | -- | (266.0) | ||||
| (1997) | (t=68.7; w=143.8) | -- | -- | -- | -- | -- | (212.5) | |||||
| 461 | 65 | 0 | 0 | 0 | 0 | 526 | ||||||
| Gila***** | 1993-1996 | (461) | (65) | -- | -- | -- | -- | (526) | ||||
| (1994) | (t=170; w=291) | -- | -- | -- | -- | -- | (461) | |||||
| 154 | 15 | 18 | 0 | 0 | 0 | 187 | ||||||
| Lincoln | 1997-1998 | (163.8) | (23.2) | -- | -- | -- | -- | (187.0) | ||||
| (1997) | (t=41.0; w=122.8) | -- | -- | -- | -- | -- | (163.8) | |||||
| 231 | 12 | 10 | 2 | 0 | 0 | 255 | ||||||
| Santa Fe | 1998-1999 | (236.7) | (16.3) | -- | -- | -- | -- | (253.0) | ||||
| (1998) | (t=152.9; w=83.8) | -- | -- | -- | -- | -- | (236.7) | |||||
| * | Field plot or location (also referred to as sample site): An area containing the field location center and all sample points, distributed over an area approximately 2.5 acres in size. A field location | |||||||||||
| layout consists of four fixed-radius subplots (1/24 acre; 24.0-foot radius) for sampling trees and understory vegetation, and four microplots (1/300 acre; 6.8-foot radius) for sampling seedlings | ||||||||||||
| and saplings. At each sample site, distinct conditions of forest land and nonforest land meeting minimum size requirements are identified. Forest land is divided into timberland and woodland | ||||||||||||
| and can be further divided into smaller conditions if variations exist in any of the following defining attributes: forest type, stand size, stand origin, and stand density. All conditions, including | ||||||||||||
| finer divisions of conditions, must meet minimum size requirements. A field plot is sampled (established and measured) if any portion of the four subplots occurs within a sampled forest land | ||||||||||||
| condition class. Each subplot/microplot area is mapped to identify distinct condition classes. Whole plots are totaled by land type accordingly: "Forest"- plots that sampled only forest conditions, | ||||||||||||
| "Nonforest"- plots that sampled only nonforest conditions, "Forest and Nonforest"- plots that sampled both forest and nonforest conditions. Nonforest land includes water. | ||||||||||||
| ** | Condition proportions are the fraction of plot area sampled on each condition. The sum of all condition proportions for a plot equals 1.00. The numbers in parenthesis are the sum of all the | |||||||||||
| condition proportions by land type (forest or nonforest). Forest land is further divided into timberland (t) and woodland (w). Nonforest land includes water. | ||||||||||||
| *** | Only includes whole field plots where all four subplots are in a nonsampled category. Plots that are partially nonsampled are absorbed into the sampled forest and nonforest categories. | |||||||||||
| **** | National Forests were inventoried over a 2 to 4 year period. The survey date listed in parentheses has been selected as the representative inventory year (this year indicates when the majority | |||||||||||
| of sample sites were inventoried). | ||||||||||||
| ***** | The Gila NF was inventoried using the "old design". This design used a 5-point bowtie cluster for sampling trees and understory vegetation. Condition boundaries were not mapped (each plot | |||||||||||
| sampled one condition). | ||||||||||||