EVALUATION OF THE INFLUENCE OF ABIOTIC FACTORS ON THE PRODUCTIVE CHARACTERISTICS IN THE SOILS OF THE GRASSLANDS ECOSYSTEM.

The soils potential is the result of interdependence between the characteristics of the vegetation and the natural environment, also the level of production is the result of the influence of determining factors: natural environmental factors and technological factors. The influence of biotope relief factors on the above-ground vegetation is a direct consequence of the altitudinal differentiation of climatic conditions, a vegetation layer and implicitly a rather varied and complex area soil cover. It is unanimously appreciated that in order to have a rich and quality harvest must be ensured the quantities of fertilizers and the necessary amendments to improve the nutritional conditions of the crop species or grassland areas. In this study we use a qualitative-productive evaluation (QPE) of grasslands soils represents according to the degree of favorability (suitability) using as a comparison tool technical indices or rating notes. Based on this study a soil map and legend were developed depending on the specific properties for each soil and land unit following each group of soils limitations. The results showed in the studied area the reaction of the soil (pH) is generally weakly acidic, the weighted average pH value being 6.68, with phosphorus supply generally medium, the weighted average phosphorus content being 22.67 ppm. The supply of potassium to the soils is very good, the weighted average potassium content being 208 ppm K. Compared to those results, depending on the specific properties for each soil and land unit was identified the soils limitations and a specific fertilization to comply with the European Code of Good Agricultural Practice so as to ensure good future production potential. [ABSTRACT FROM AUTHOR]