SUSTAINABLE SOIL AND LAND MANAGEMENT IN THE ARANCA PLAIN – S.W. ROMANIA PUBLISHEDDorin ŢĂRĂU, Gh. ROGOBETE, Adia GROZAV, D. DICU, A. ŢĂRĂU
The importance of land-use planning and the use of the soil survey to develop land suitable for its intended purpose were introduces in the early 1960s. The objective proposed in this paper was to make evident the aridization tendencies to the Aranca Plain area, the divisions the urgency zones emplaced in forest belts in order to protect the terrain from Beba-Veche village. According with Romanian Taxonomic System of Soils (SRTS 2003) and WRB for SR 1998, in researched area have been identified 6 classes, 8 types, 35 undertypes, 98 varietys and other units, which are different through their propertys, their productiv capacity and measures for maintainance and increase their fertility. Crop production can be done in the different conditions: natural ecosystems (without or with human intervention), or agro-ecosystems, extensive or intensive (direct or indirect involvement of the state) requires with a pressing necessity as deep knowledge of all ecological determinants, for which each of the 136 units of land (TEO) identified were characterized under the current methodology of the soil studies using the 23 indicators of evaluation, indicators which represent character and traits most important, more significant, specific and measurable. These dates were completed by a detailed soil survey effectuated in the Aranca Plain. There were studied 79 main soil profiles from which are dominant Chernozems and Vertisols, both soil types with a high content of soluble salts and sodium.Soil-solution-soil-matrix physico-chemical interactions enhanced by dilute soil solution with high sodium, affect the flow parameters considerably. Vertisols, which is a deep clayey soil, dominated by clay minerals such as smectites, expand upon wetting and shrink upon drying. They form wide cracks from the soil surface when drying out. From the types of existent forest-belt it is estimate that the next belts give a good result for the argillaceous soils from the Aranca Plain: Populus euramericana and Quercus robur with Syringa v., Ligustrum v., Cornus m.; the belt with Pinus silvestris and Quercus rubra with Ribes a., Cornus m., Robinia p. For the 9300 hectares surface of Bebe-Veche village, the necessary of seedling plants is 324670, along the drainage channel, access roads and around the agricultural farms. We recommend also, to re-use the drainage water, where the quality of the water is acceptable, but not a direct connection between the drainage system and the irrigation system.
argillaceous soils, aridization, forest-belt, soil survey, sustainable soil