A vegetation productivity equation for reclaiming surface mines in Clay County, Minnesota
Titel:
A vegetation productivity equation for reclaiming surface mines in Clay County, Minnesota
Auteur:
Burley, Jon Bryan
Verschenen in:
International journal of mining, reclamation and environment
Paginering:
Jaargang 5 (1991) nr. 1 pagina's 1-6
Jaar:
1991
Inhoud:
This paper addresses the development of a vegetation productivity equation for predicting plant growth potential in Clay County, Minnesota on reconstructed soils (neo-sols) created during surface mine reclamation. Soil factors examined in the study include percent organic matter, percent slope, percent rock fragments, hydraulic conductivity, electrical conductivity, pH, topographic position, available water holding capacity, bulk density and percent clay. Squared terms and two-factor interaction terms were also examined as possible regressors. A best equation was selected that has a multiple coefficient of determination of 0ยท7952 and has six significant regressors and intercept with p<.0101. The regressors are hydraulic conductivity, percent slope times topographic position, electrical conductivity times percent rock fragments, electrical conductivity times percent clay, electrical conductivity times bulk density and percent organic matter times percent rock fragments. The regressors predict soil suitability as a general vegetation model. The crops included in the vegetation model are wheat, oats, barley, soybeans, sugar beets, sunflowers and grasses/legumes. The trees and shrubs included in the model are Caragana arborescens, Celtis occidentalis, Cornus sericea, Fraxinus pennsylvanlca, Juniperus vlrginiana, Picea glauca densata, Ficea pungens, Pinus ponderosa scopulorum, Populus deltoides, Prunus araericana, Prunus vlrginiana, Salix alba tristis, Syringa vulgaris and Ulmus pumila.
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