YIELD CAPACITY LIMITATIVE FACTORS IN ARAD PLAIN SOILS PUBLISHEDAndrei ILIUȚĂ, Dorin ŢĂRĂU, Bogdan BEȘTI
Soil, represent a major component in agriculture due not only to its own characteristics but also to its aggregant capacities for other environement factors influence. As agroecosystem element, the soil may favour productivity through a range of defined specific properties, such as: pH , granulometry, nutritive elements equilibrium, organic matter, thermic and hydric regime, mineralogic composition, etc. Practical action requires complex study of soil properties in interaction with soil genetics, climate and biologic factors. Approached issues in this paper refer to a 182.080 ha of agricultural terrain, belonging from the geomorphologic point of view to Aradului plain and from the hydrographic point of view to a part of Romanian south-west hydrographic system, improved by hidro –ameliorative works. We also describe microclimate (temperature, groundwater and rain regime) and phytogeographic characteristics of this area. As a result, pedogenetic factors interaction generate a numerous soil species with evolving specific characteristics. We note that soil properties cover fundamental geographical characteristics: in our research area follows the same step distribution as relief or climate. All the interpretations, evaluations and classifications have as support the pedological information resulted using soil survey methodology as it follows: Ecopedological conditions research, data organizations and processing were made accordingly to ,,Pedological studies Elaboration Methodology’’, issued by ICPA Bucuresti in 1987, copleted by ,,Romanian Soil Taxonomic System (SRTS 2003). Soil chemical, fisica, hidrofisical characteristics determinations were performed after standard metodology elaborated by tutelary scientific Institute –ICPA , in OSPA Arad laboratory. Samples harvestind and terrain evaluation were made by qualified staff accordingly to standard methology. Within this system was elaborated the Romanian lands pedo-climatic grouping, soil rating and technological characterization of the area. In overall caracterization , the paper presents data referring to soil quality status in our considered area, as basic element in its ecological and technical approach. In the same time demonstrates the necessity of correct crop assignation due to certain limitative factors.
factor, composition element, area, agroecosystem, rural