EVALUATION OF THE SOIL PROPERTIES VARIABILITY IN RELATION TO DIFFERENT CROP TYPES

The aim of the study was to evaluate the variation of the chemical properties of the haplic luvisol under different cultivation conditions (cropland, orchard and meadow) and the influence of this variability on the main ecophysiological groups of the soil microorganisms. The soil samples were collected from an experimental plot located in Cauaceu locality area, Bihor County, Romania, in spring and autumn of the year 2014-2015. Some soil chemical parameters, total number of aerobic heterotrophic bacteria, Actinomycetes and fungi were analyzed. Data was subjected to the two-way analysis of variance (ANOVA) (P = 0.05), and in order to determine the samples means statistical differences the Tukey test of pairwise comparisons was used. The results indicate significant differences between soil cultivation practices, for majority of the studied parameters. This fact is also revealed by the multivariate analysis (Principal Component Analysis, Linear Discriminant Analysis, Multivariate Analysis of Variance MANOVA (P = 0.05) and Hierarchical Cluster Analysis).