Sustainable Agriculture and Rural Development in Terms of The Republic of Serbia Strategic Goals Realization within The Danube Region(preservation of rural values)

International Scientific Meeting „Sustainable Agriculture and Rural Development in Terms of The Republic of Serbia Strategic Goals Realization within The Danube Region“ (preservation of rural values), which be held in period 6-8th December 2012 on mountain Tara (Republic Serbia), through major number of presented papers provides an overwiew of results of scientific research on the integrated and interdisciplinary project „Sustainable agriculture and rural development in terms of the Republic of Serbia strategic goals realization within the danube region“. International Scientific Meeting „SUSTAINABLE AGRICULTURE AND RURAL DEVELOPMENT IN TERMS OF THE REPUBLIC OF SERBIA STRATEGIC GOALS REALIZATION WITHIN THE DANUBE REGION“ (preservation of rural values), gathered major number of scientific and experts researchers from about the countries. Besides the authors from Republic Serbia in papers are represented and authors from Romania, Bulgaria, Russian Federation, Bosnia and Herzegovina, Hungary, Netherland and Macedonia, Poland. In frame of the Proceedings, is positively evaluated by the reviewer and presented on the Scientific Meeting 91 paper and it is published in the Proceeding. Publisher is Institute of Agricultural Economics, Belgrade, together with 38 eminent scientific and educational Institution from Serbia and foreing. In the Plenary section was presents three (3) papers which stand out with their contributions to our Scientific Meeting. Rest of the paper are systematized in three (3) sections. Represent and published papers are systematized in three (3) thematic section: I SUSTAINABLE DEVELOPMENT AS A MODERN DEVELOPMENTAL APPROACH IN PRESERVATION OF AGRICULTURE AND RURAL VALUES (in this section represented 41 papers); II STRATEGIC PLANNING AND INSTITUTIONAL-POLITICAL DIMENSION OF AGRARIAN AND RURAL DEVELOPMENT (in this section represented 13 papers); III AGRIBUSINESS OF RURAL AREAS, DIVERSIFICATION AND COMPARATIVE ADVANTAGES OF RURAL ECONOMY (in this section represented 34 papers)

ЕSTIMATION OF YIELD STABILITY OF ZP MAIZE HYBRIDS USING DIFFERENT STATISTICAL MODELS

Eight ZP maize hybrids, belonging to FAO 300-400 maturity groups, were tested during the 2018 year at six different environments in Serbia. All examined hybrids have been recently registered in Serbia. The aim of the study was to identify hybrids with the highest grain yield, as well as with high yield stability over different environments. The experiment was conducted according to Randomized Complete Block Design in three replications. For the estimation of yield stability, different statistical analyses were done: regression coefficient (bi), deviation from regression (S2 di), Shukla stability variance (ri2 ), and cultivar superiority measure (Pi). Maize hybrids ZP 4540 and ZP 4077 showed the highest yield potential, but they also had high moisture content in harvest. Hybrid ZP 4567 had above average yield and also high stability, while hybrid ZP 3536 had average yield, good stability and the lowest moisture content in the harvest. Although hybrid ZP 4540 obtained the highest grain yield in trial, it performed unstable according to the results of stability analysis. Based on the results obtained in the experiment, hybrids ZP 4567 and ZP 3536 are recommended for further testing in 2019 and initial commercializatio

IMPACT OF GRAZING ON SOIL ORGANIC MATTER AND PHYSICAL PROPERTIES OF A FLUVISOL IN NORTWEST SERBIA

The effects of long-term (>20 yr) grazing on the selected physical properties of a non carbonated silty-clay Fluvisols were studied in the region of the Kolubara Valley, Northwest Serbia. Two adjacent land-use types (native deciduous forest and natural pasture soils converted from forests for more than 20 years) were chosen for the study. Disturbed and undisturbed soil samples were collected from three sites at each of the two different land-use types from the depths of 0–15, 15–30 and 30–45 cm. In relation to the soil under native forest, soil organic matter content, total porosity and air-filled porosity were significantly reduced after long-term of grazing. The bulk density (0.99–1.48 g cm–3) and the saturated hydraulic conductivity (6.9.10–2–3.2.10–4 cm s–1) were significantly lower in forest compared to the adjacent pasture (ex-forest) soil (1.49–1.55 g cm–3 and 3.4.10–4–5.5.10–4 cm s–1, respectively). In addition, forest had significantly lower dry mean weight diameter (7.0–9.2 mm) and greater wet mean weight diameter (2.0–2.6 mm) for 0–45 cm depth compared with the pasture (8.8–9.4 mm and 1.8–2.3 mm, respectively). The decrease of soil organic matter content and reduction in aggregate stability under long-term grazing rendered the soil more susceptible to compaction. In conclusion, the results of this study indicate that removal of permanent vegetation in the conversion process from forest areas to pasture land may lead to loss of soil productivity and serious soil degradation. Obviously, there is a need for greater attention to developing sustainable land use practices in management of these ecosystems to prevent further degradation of pasture soils in the region

Variation of Soil Structure in the Foot and Toe Slopes of Mt. Vukan, East-central Serbia

This paper presents the variation of soil structure along the foot and toe slopes of Mt. Vukan, East-Central Serbia. The analysis of aggregate size distribution and structure indices were conducted by means of soil units, characteristic soil horizons and elevation differences along the study area. Soils of Great Field located at different elevations were found to have significant variation in ASD and soil structure indices. Topsoil horizon of Eutric Cambisols have higher MWD after dry sieving, but at the same time it has the highest variation in MWD after wet sieving, indicating low water stability, which is opposite to the coefficient of aggregability. We share an opinion that change in MWD better depicts soils structure stability to water. The results of correlation analysis indicated that clay content is correlated more to structure indices compared with SOM content. SOM is significantly correlated with ASD and soil structure indices only in Calcomelansols, whereas the significant correlation of clay content and soil structure is more evident in Eutric Cambisols and Non-calcaric Chernozems, compared with other soil units. Soil structure variation along the lowest chain of Catena might be strong, and that it has to be analyzed from the point of view of soil unit and their corresponding soil horizons