Items starting with L


Limits of Acceptable Change

Ladder Fuels

Vegetation located below the crown level of forest trees which can carry fire from the forest floor to tree crowns. Ladder fuels may be low-growing tree branches, shrubs, or smaller trees.

Land Class

The topographic relief of a unit of land. Land classes are separated by slope; this coincides with the timber inventory process. The three land classes used in the Forest Plan are defined by the following slope ranges: 0 to 35 percent; 36 to 55 percent; and greater than 55 percent.

Land Use Allocation

The identification in a land use plan of the activities and foreseeable development that are allowed, restricted, or excluded for all or part of the planning area based on desired future conditions.

Land Use Plan

A set of decisions that establish management direction for land within an administrative area as prescribed under the planning provisions of FLPMA; an assimilation of land-use and plan-level decisions developed through the planning process outlined in 43 CFR 1600 regardless of the scale at which the decisions were developed.

Land Use Plan Decision

Establishes desired outcomes and actions needed to achieve them. Decisions are reached using the planning process in 43 CFR 1600. When they are presented to the public as proposed decisions they can be protested to the BLM Director. They are not appealable to IBLA.

Land Use Planning

The process of organizing the use of lands and their resources to best meet people's needs over time according to the land's capabilities.

Land Use Planning Base

The entire collection of land use plan decisions resulting from RMP, MFPs planning analyses, the adoption of other agency plans or any other type of plan where land use-plan-level decisions are reached.


Any place where cut timber is assembled for further transport from the timber sale area.


The boundary lines for National Forest land.


An area of interacting and interconnected patterns of habitats (ecosystems) that are repeated because of the geology, landform, soil, climate, biota, and human influences throughout the area. A landscape is composed of watersheds and smaller ecosystems.

Landscape characteristics

The distribution and representation of ecoregions and elevational classes; the size of relatively large and intact habitat areas, and their adjacency to protected habitats; the effects of lands with protected or conservation status on landscape fragmentation; and the relationship between landscape and disturbance patterns.

Late Forest Succession

The stage of forest succession in which most of the trees are mature or overmature.

Leasable Minerals

Minerals such as coal, oil shale, oil and gas, phosphate, potash, sodium, geothermal resources, and all other minerals that may be acquired under the Mineral Leasing Act of 1920, as amended.

Life Zone

Areas or "belts" of land that have distinct plant and animal characteristics determined by elevation, latitude and climate. When ascending a high mountain you will pass through these life zones. Examples of life zones include the Upper Sonoran, where Cedar City is located and gramma grasses, sagebrush, and scattered pinyon juniper predominate, and the Transition zone, where Ponderosa pine is predominant.

muirnet logo 400 76

OutdoorWire, 4x4Wire, JeepWire, TrailTalk, MUIRNet-News, and 4x4Voice are all trademarks and publications of OutdoorWire, Inc. and MUIRNet Consulting.
Copyright (c) 1999-2019 OutdoorWire, Inc and MUIRNet Consulting - All Rights Reserved, no part of this publication may be reproduced in any form without express written permission. You may link freely to this site, but no further use is allowed without the express written permission of the owner of this material. All corporate trademarks are the property of their respective owners.