Approach to reporting heavy metal, metalloid and toxic element contamination in land evaluation of reclaimed soils
Keywords:
agricultural lands, land evaluation, reclaimed soils, soil contaminationAbstract
In the background of the existing officially validated “Methodology of Work in the Cadaster of Agricultural Land in Bulgaria” (Petrov. E., et al, 1988), which does not treat the issues of evaluation of remediated and contaminated soils, the present article presents an element of a future common system of land evaluation, which should be developed and applied into practice.
The national standards of accounting for the soil contamination as well as the international experience (FAO recommendations) in the field have been taken into consideration. Algorithms of land evaluation of remediated soils, contaminated by heavy metals, metalloids and toxic elements, have been devised.
The algorithms lead to an Equation, through which the “leading” contaminator is established as well as two land evaluation scales (Method accounting for the number and severity of limitations), serving as “actual” and “potential” assessments. An example for working with the standards, the equation and the scales has been provided in the article.
References
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FAO (1979). Land Evaluation Criteria for Irrigation. World Soil Resources Report, 50, FAO, Rome, Italy, 219.
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FAO (1991). Guidelines: Land Evaluation for Extensive Grazing. Soils Bulletin, 58, Food and Agriculture Organization of the United Nations, Rome, Italy.
FAO (1993). Computerized Systems of Land Resources Appraisal for Agricultural Development. World Soil Resources Report, 72, Rome, Italy.
FAO (2001). Indicadores de la Calidad de la Tierra y su uso Para la Agricultura Sostenible y el Desarrollo Rural. Boletín de Tierras y Aguas de la FAO, No 5, Food and Agriculture Organization of the United Nations, Rome, Italy.
Ordinance № 26 for Reclamation of Disturbed Terrains, Enhancement of low Productivity Lands, Divesting and Utilization of the Humus Layer. Publ. State Gazette, Issue 89/1996, amendment State Gazette, Issue 30/22 March, 2002.
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Petrov, E., Kabakchiev, I., Bozhinova, P., Stoeva, A., Georgieva, Y., Hershkovich, E. & Dilkov, D. (1988). Methodology for work on the Cadaster of agricultural land in the Republic of Bulgaria, 144, NAIU Association, Sofia.
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