Stand Management Prescription Guidebook

Table of contents

Ecological information, site and stand characteristics

General objective

  • To record the ecological classification of the site and describe site and stand conditions that limit operations.

The SMP must specify the biogeoclimatic ecosystem classification (BEC) and critical site conditions that would affect the type, intensity and timing of operations. Any additional information requirements are not legislated, but may be useful for making and supporting decisions, and could be included or attached to the document.

An ecological approach to forest management is essential to ensure that forest and soil resources are sustained.

The ecological evaluation of the area helps to identify the site associations upon which a SU is based. The aggregation of similar site associations that have similar management objectives forms the basis of a SU.

For additional detail on completing this section of the SMP form, refer to the ecology section in the Silviculture Prescription Guidebook and the completed example in the appendix of this guidebook.

Biogeoclimatic ecosystem classification

* The SMP must contain the following ecological information:

Ecological classification and interpretation guidance is provided in the following publications:

Banner, A., et al. 1993. A field guide to site identification for the Prince Rupert Forest Region. B.C. Min. For., Victoria, B.C. Land Manage. Handb. 26.

B.C. Ministry of Forests. (draft) 1989. A field guide for the identification and interpretation of ecosystems in the Cariboo Forest Region. Research Section, Williams Lake, B.C.

Braumandl, T.F. and M.P. Curran. 1992. A field guide for site identification and interpretation for the Nelson Forest Region. B.C. Min. For., Victoria, B.C. Land Manage. Handb. 20.

DeLong, C., et al. 1990. A field guide for identification and interpretation of ecosystems of the northeast portion of the Prince George Forest Region. B.C. Min. For., Victoria, B.C. Land Manage. Handb. 22.

DeLong, C., et al. 1994. A field guide for site identification and interpretation for the northern Rockies and portions of the Prince George Forest Region. B.C. Min. For., Victoria, B.C. Land Manage. Handb. 29.

Green, R.N., et al. 1994. Site identification and interpretation for the Vancouver Forest Region. B.C. Min. For., Victoria, B.C. Land Manage. Handb. 28.

Jull, M.J., et al. 1993. A field guide for site identification and interpretation for the southern portion of the Prince George Forest Region. B.C. Min. For., Victoria, B.C. Land Manage. Handb. 24.

Lloyd, D., et al. 1990. A guide to site identification and interpretation for the Kamloops Forest Region Part 1 and Part 2. B.C. Min. For., Victoria, B.C. Land Manage. Handb. 23.

MacKinnon, A., et al. 1990. A field guide for identification and interpretation of ecosystems of the northwest portion of the Prince George Forest Region. B.C. Min. For., Victoria, B.C. Land Manage. Handb. 21.

C-1. Area description

* SU area

Indicates the size in hectares of the SU (net of all roads and landings) but includes all treatment areas (TAs) plus inclusions of special areas (SAs).

* Treatment Area

Indicates the area of the individual treatment areas. Net treatable area should be verified post-treatment.

* Zone, sub-zone, variant,

Enter the BEC zone, sub-zone, variant and site series

site series, phase, type

for this SU. Where site series varies estimate the percent cover of the various site series. Refer to BEC maps and guidebooks for ecosystem identification (phase and type may be needed in some cases).

* Moisture/nutrient grid

Refer to the edatopic grid for the appropriate BEC unit and enter the moisture and nutrient grid codes - may include a range (e.g., 4-5/C-D).

Elevation range (m)

Enter the minimum, maximum and average elevation for the SU.

Aspect

Enter the dominant direction that the SU is facing, as azimuth in degrees. If the area is flat, enter "F."

Slope %

Indicates the average slope over the SU in percent.

Slope position

Describe as per site diagnosis procedures (e.g., upper slope, flat).

Slope length (m)

Enter `L' or `LONG' where the distance is equal to or greater than 150 m between major slope breaks, enter `S' or `SHORT' where the distance is less than 150 m between major slope breaks.

Slope uniformity

For uniformity, enter `U' or `UNIFORM' if there is one or less cross drainages per 100 m of contour. This information is used in determining erosion hazard and site sensitivity.

Humus form

Enter mor, moder or mull.

Rooting depth

Enter rooting depth (in centimetres).

Soil depth to restricting

Indicates the average depth in cm from the surface

Layer

to either gleyed, impervious or calcareous layers or bedrock if present.

Soil texture

Enter soil texture based on the soil textural triangle.

Soil coarse fragments

For coarse fragments (% CF), enter an estimate of the percentage of the total volume of soil material (by horizon if necessary) that is comprised of fragments 2 mm and greater in diameter.

Drainage

Enter as very rapid, rapid, well, moderately well, imperfect, poor or very poor.

Water courses and gullies/100 m

Enter the number of water courses and gullies per100 m of contour on the SU. This information is used in determining erosion hazard and site sensitivity.

* Where mechanized stand tending is prescribed, the hazards for soil compaction and the maximum proportion of each treatment area that may be occupied by soil disturbance caused by the mechanized stand tending treatment must be specified. If trail building is associated with the mechanized treatment, the hazards for soil erosion and soil displacement must be assessed and listed in the SMP. If trail building is associated with the mechanized treatment and the slope gradient is greater than 60 percent, the area must be assessed for the likelihood of landslides. For guidance in assessing site sensitivity refer to the Soil Conservation Guidebook. To determine the appropriate level of mapping detail, see the "Mapping requirements" section of this guide.


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