In situations where it is necessary to perform a large number of experiments in order to collect adequate statistical data which require expert analysis and assessment, there is a need to define a model that will include and coordinate statistical data and experts' opinions. This article points out the new integrated application of the Analytic Hierarchy Process (AHP) and Bayesian analysis, in the sense that the Bayes' formula can improve the accuracy of input data for the Analytical Hierarchy Process, and vice versa, AHP can provide objectified inputs for the Bayesian formula in situations where the statistical estimates of probability are not possible. In this sense, the AHP can be considered as the Bayesian process that allows decision-makers to objectify their decisions and formalise the decision process through pairwise comparison of elements.

This paper deals with results of the effects of three tillage systems and differentnitrogen fertilizer level on floristic composition of weed community in winterwheat in investigated period on the chernozem-luvic soil type. The trial was carriedout on the estate experimental field of the Faculty of Agriculture - Zemun"Radmilovac" near Belgrade in Serbia. Tillage systems and fertilization withnitrogen fertilizers have a big influence on weed control and floristic composition,number of species and individuals and biomass of weeds in winter wheat. Theweed community in winter wheat crops was composed of 14 weed species in bothyear of investigation, respectively, with dominancy of terophytes. The obtainedresults showed that the dominant weed species were Avena fatua L., Papaverrhoeas L., Sinapis arvensis L. and Stellaria media (L.) Vill. from annuels and.Convolvulus arvensis L. from perennials prevailed in the weed community inwinter wheat crops.Conventional tillage system with nitrogen level in top dressing120 kg ha-1 had better effect in weed control than both of both investigatedconservation tillage systems (MTS and NTS) had. However, mulch tillage has notlagged behind the conventional tillage increased total weed number of individualsannual and perennial species especially fresh biomass. No-tillage system makesweed control difficult.

In this paper the results of efficiency of combined application of six herbicides in weed control in potato were presented. The study was done during 2007 and 2008 in Kolašin, on acid brown soil, at an altitude of about 900 m. In the experiment the following herbicides were examined: S-metalachlor, Bentazone, Acetohlor, Flurochloridone, Metribuzin and Dimetenamid-P. The study was conducted in the Kennebec variety crop. All applied herbicides had satisfactory effect in decreasing number and biomass of weeds. As the most effective variants in two-year average, Sencor 70 WP and Genius were expressed (95 and 94% for the number and 92 and 88.8% for weed biomass) and the weakest effect had combination of Dual Gold 960 EC + Basagran (82.3; 69.4, respectively). In all investigated combinations of herbicides significantly higher tuber yield was achieved comparing to the control. The highest yield of tubers was measured in variant where Acenit 800 EC was applied -33 t ha -1 , while the lowest yield had the control variant -18.4 t ha -1 .

The purpose of this research is to analyse the competitiveness of south-eastern Europe (SEE) countries with the help of The Travel and Tourism Competitiveness Index (TTCI) and The Global Competitiveness Index (GCI), as well as to explore the correlation and mutual influence of these two indices. The aim is to explore the homogeneity of SEE countries according to tourism competitiveness performance. The research was conducted on the basis of secondary data sources and statistical methods, with emphasis on the cluster analysis. Structurally, the article is composed of the following parts: Analyses of the competitiveness of SEE countries according to GCI and TTCI, exploration of SEE countries homogeneity according to the GCI and the TTCI sub-indices, as well as according to the pillars within the TTCI. The research results indicate that there exists a high correlation between the TTCI and GCI, as well as that SEE countries are not homogenous according to these indices. The research provides the initial framework for benchmarking the tourism performance of different countries, and determination of objectives and strategies for improving tourism competitiveness.

Acid soils are not suitable for cultivation of agricultural crops as increased concentrations of hydrogen ions hinder the uptake of most nutrients. The adverse effects of increased soil acidity also include release of aluminium (Al) ions from the adsorption complex and hence, an increase in their concentration in the soil solution and plants. Aluminium ions block phosphorus and potassium uptake by the crop, thus leading to disturbance of plant growth and development, as well as to a substantial decline in crop yield and quality. This suggests that the use of such soils is not justified in terms of successful plant production. The objective of this study was to use liming to neutralise excess acidity of pseudogley soil under oat crop and evaluate the effect of soil pH improvement measures on the aluminium content of both the leaf and root of oat (Avena sativa L.) cv. Mediteran. Three liming treatments were employed [1.0, 3.0 and 4.0 t ha -1 calcium carbonate (CaCO 3 )]. The treatments with 3.0 and 4.0 t ha -1 CaCO 3 induced no Al presence in oat plants, suggesting that liming in these treatments was successful in terms of aluminium content.