• Phase II - Degraded Plant Condition

Potential At-Risk Maps and Information

No changes from Phase I

The following are the potential at-risk maps produced during the Arkansas Resource Assessment - Phase I. The NRCS definition of the natural resource concern and the input layers and land use designation weights that were used for modeling the natural resource concern within the Degraded Plant Condition Resource Concern are listed to the right of each map. More detailed maps are available by clicking the link below each map.
Undesirable Plant Productivity and Health
(View Individual Data Layer Extents)

    NRCS Definition:
        Plant productivity, vigor, and/or quality do not negatively impact other
        resources or meet yield potential due to improper fertility, management, or
        plants not adapted  to site. As an example this concern addresses
        pollinators, beneficial insects, wind erosion, and excess soil deposition that
        influence plant condition.

    Land Use Designation Weights:
        Crop, Pasture, Forest, Range, Urban and Assoc. Agland (Weight 1);
        Water (Weight 0)

    Binary Input Layers and Associated Weights:
        – SSURGO Available Water Capacity <= 10 (Weight 1)
        – SSURGO Wind Erodibility Group Classes 1 and 2 (Weight 1)
        – Cropped Area of Herbicide Resistant Crops (Weight 2)



Inadequate Structure and Composition
(View Individual Data Layer Extents)

    NRCS Definition:
        Plant communities have insufficient composition and structure to achieve
        ecological functions and management objectives. As an example, this
        concern addresses loss or degradation of wetland habitat, targeted
        ecosystems, or unique plant communities.

    Land Use Designation Weights:
        Crop, Pasture, Forest, Range, Urban, Assoc. Ag (Weight 1);
        Water (Weight 0)

    Binary Input Layers and Associated Weights:
        – SSURGO Available Water Capacity <= 10 (Weight 1)
        – Ice Storm Damage Area, presence of (Weight 1)



Excessive Plant/Pest Pressure
(View Individual Data Layer Extents)

    NRCS Definition:
        Excessive pest damage to plants including that from undesired plants,
        
diseases, animals, soil borne pathogens, and nematodes. As an example,
        this concern  addresses invasive plant, animal, and insect species.
 
    Land Use Designation Weights:
        Crop, Pasture, Forest, Range, Urban, Assoc. Ag (Weight 1);
        Water (Weight 0)

    Binary Input Layers and Associated Weights:
        – Southern Pine Beetle Risk Area, presence of (Weight 1)
        – Red Oak Borer Risk Area, presence of (Weight 1)
        – Fire Ant Quarantine Area by County, presence of (Weight 1)

    Classified Input Layers and Associated Weights:
        – USFS Insect and Disease Potential
            < 3 (Weight 0)
            3-4 – Low (Weight 1)
            4-5 – Moderate (Weight 2)
            > 6 – High (Weight 3)



Wildfire Hazard, Excessive Biomass Accumulation
(View Individual Data Layer Extents)

    NRCS Definition:
        The kinds and amounts of fuel loadings (plant biomass) create wildfire                 hazards that pose risks to human safety, structures, plants, animals,
        and air resources.

    Land Use Designation Weights:
        Forest and Range (Weight 2); Crop, Pasture, Urban, Assoc. Ag (Weight 1);         Water (Weight 0)

    Binary Input Layers and Associated Weights:
        – Southern Wildfire Risk Assessment (Weight 1)
        – Ice Storm Damage Area, 2009 (Weight 1)
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