bluuebunny/crossref_metadata_2025 huggingface dataset:
Climatic specifications of Ohrid area of vineyards
Authors: Ilic-Popova Srebra
Published: October 2010

The purpose of the research is the examination of the climatic characteristics, indexes and coefficients in the Ohrid area of vineyards. In the region under study the average annual air temperature was 11.5?C, and the vegetative air temperature had a value of 16.7?C. The annual temperature sum was 4198?C, and ranged from 4033?C to 4524?C. The vegetative sum had a value of 3570?C, and it ranged from 3326?C to 3754?C. The annual rain sum was 665 mm, and ranged from 483 mm to 927 mm. The vegetative rain sum had a value of 342 mm, and ranged from 200 mm to 541mm. On the basis of the values of effective temperature sum, it can be concluded that the Ohrid area of vineyards belongs to the climatic zone B. The values of the hydro-thermic coefficient indicated that in the area of vineyards, where the research was conducted, there was an irregular schedule of humidity. The helio-thermic coefficient had a value of 4.4. The bio-climatic index had a value of 7.7 and ranged from 4.8 to 15.2. The results of this research indicate that the Ohrid area of vineyards is favorable for production of table and wine grape for varieties that ripen from I to II epoch.
Unstability of food production per capita and population: Asia
Authors: Jablanovic Vesna
Published: October 2010

The basic aims of this paper are: firstly, to set up an endogenous model of food production per capita and population; secondly, to estimate the food production per capita regression equation and population regression equation; and thirdly, to determine stability properties of food production per capita and population in Asia during the period 1967-1997. Empirical content of this model confirms the fact that movement of food production per capita and population had unstable character in Asia in the observed period.
Effect of partial root drying on growth and photosynthesis of tomato (Lycopersicon esculentum L.)
Authors: Savic Sladjana
Published: October 2010

Tomato plants were grown in commercial compost with the root system divided equally in two parts (PRD technique). At the end of vegetative and during generative stage of development, half of the root system was exposed to drought, while the remainder of the root system was irrigated. One PRD treatment took c.10 days and during this period the soil water content in the dry root side was reduced to 30%. After this, the treatment was reversed, allowing the previously dry compartment to be well-watered and the well-watered compartment to dry down. In control plants both compartments were watered daily to drip point throughout the experimental period. During experimental period the following measurements were done: plant height, leaf number and area, number of flower trusses, number and diameter of fruit leaf gas exchange (photosynthesis and transpiration), leaf water potential leaf apoplastic pH and water-use efficiency (WUE). Obtained results of plants height and leaf number and area showed that, as a consequence of PRD treatment, the growth of whole plants was reduced, but not fruit, although WUE was increased. These results pointed out that with PRD technique it is possible to reduce irrigation water without significant reduction effect on tomato yield.
Drainage system maintenance problems in the melioration region of VDP "Juzni Banat"
Authors: Rudic Dragan , Djurovic Nevenka , Pivic Radmila
Published: October 2010

The aim of this paper is a case study of a melioration region, which will show the state of the channel network, as well as the scope of the implemented maintenance measures, which resulted in the reduced functionality of the drainage system. Melioration channels are in most cases in the function of drainage, and a minor number has a double function (drainage and irrigation). The dense network of channels, erected throughout the catchment area, is capable of receiving all the design surplus water. However, during the past decade, the channel network was not maintained to the required level, which caused the reduced functionality of the drainage system. The channels are invaded by annual and perennial plants, channel cross-sections are silted with mud, there are landslides of the slopes parts of water cross-sections are blocked, etc. These are the consequences of the inadequate maintenance of the drainage system and the accompanying structures.
Comparative studies of some white wine cultivars in the sub-region of Belgrade and Nis
Authors: Sivcev Branislava , Cvetkovic Dragoslav , Petrovic Nevena , Popadic Ivana
Published: October 2010

In two wine-growing areas with different climatic characteristics 12 cultivars intended for the production of white wines were studied. The climatic characteristics include: mean annual air temperatures, mean vegetation air temperatures, heliothermal coefficient, hydrothermal coefficient and active temperatures sum from the moment of the growth of shoots to their full maturity for each studied cultivar. Elements of buds fruitfulness (6 features in total), yield, cluster mass, sugar quantity and grape quality were observed in both localities. In the vineyards of Grocka and Kutina high yielding varieties Ugni blanc and Dimyat can be grown with great success. Italian Riezling produced higher yields and better quality of unfermented grape juice in the vineyards of Grocka in comparison with the vineyards of Kutina. Pinot blanc in both localities was characterized by high yield, but the quality of unfermented grape juice was better in the vineyards of Grocka. Variety Rkaciteli produced high yield and good quality of unfermented grape juice in the experimental period in the vineyards of Kutina.
Effects of the use of acetic acid as the conservant in lucerne ensiling
Authors: Djordjevic Nenad , Grubic Goran , Glamocic Dragan
Published: October 2010

The influence of acetic acid as the chemical conservant in three doses (4, 6 8 g/kg green mass) on the intensity of fermentation and proteolysis in lucerne silage was investigated. On the basis of chemical analysis, it was found that with the increase of conservant dose the pH value decreased aminogenesis and nitrogen solubility was limited. In silages treated the absolute and relative domination of acetic acid was found in total acid content. The increase of free and bonded acetic acid was discovered with the increase of conservant dose. Free butyric acid was not detected, while bonded butyric acid was present in negligible concentration, without effect on silage quality. Compared to control silage (III quality class according to DLG and Zelter method), a significant increase of acetic acid in silages resulted in the decline of their quality, and they were ranked as not useful (V quality class according to DLG method), or on the margin of usefulness (IV quality class according to Zelter method). In spite of some foreign references, domestic experiences show that acetic acid is not an effective conservant and it is not recommended for that use for lucerne that is not simple to ensile.
Influence of thermal treatment on tannin content and antioxidation effect of oak acorn quercus cerris extract
Authors: Rakic S. , Maletic Radojka , Perunovic Marija , Svrzic Gordana
Published: October 2010

The results of investigation of the tannin content in the oak acorn kernel Quercus cerris, qualitative analysis of tannin and antioxidation effect of ethanol extracts of acorn on porcine lipid (prime steam lard) as a substrate are presented in this paper. Experiments were carried out on kernel samples of the domestic oak acorn, from the location Zaglavak, near by the town of Bajina Basta. Tannin content was determined by spectrophotometric procedure using phosphorus Wolframic acid on wave length of 715 nm. Qualitative analysis of tannin included sediment and stain responses as well as tannoform test with formalaldehyde and HCl. Antioxidant effect of ethanol extracts was investigated on fat samples treated at the temperature of 600C in the dark (Schaaloven test). The rate of oxidation was determined by measuring Peroxide value (Pb) and TBA value. The investigated extracts were obtained based on drying of acorn kernel and extracts based on thermal treatment - dry frying of acorn kernel. The obtained results show that dried acorn kernel contains 11.69 % of tannin and thermally treated acorn kernel 8.55%. Qualitative analysis confirmed the presence of gallic acid (pyrogallic, hydrolysing) tannins based on positive general sediment and stain responses on tannins. Ethanol extracts demonstrate antioxidation traits on porcine lipids in trial conditions. Synergistic effect of citric acid with primary anti oxidant was not proved. Thermal treatment of acorn kernel does not reduce the antioxidation activity of extracts.
Antimicrobial activities of constituents from isolona cauliflora verdc and cleistochlamys krikii benth, oliv.: Annonaceae
Authors: Odebode A.C. , Madachi S.J.M. , Joseph C.C. , Irungu B.N.
Published: October 2010

Antimicrobial activities of crude extract, Caulindole D, a mixture of Caulindole E and F, Pinocembrin and an Oxyheptanoid (Clestochlamic acid) from stem bark of Isolona cauliflora and Cleistochlamys krikii on Pseudomonas phaseolicola, Fusarium solani, Botryodiploida theobromae Aspergillus niger and Aspergillus flavus have been investigated. An in vitro bioassay test showed that the crude dichloro-methane extract from C. krikii and a very strong antimicrobial property. The pure compound had strong to moderate inhibitory effect on Pseudomonas syringae pv. phaseolicola and Botryodiplodia theobromae. The pure compounds from Cleistochlamus krikii had more pronounced inhibitory activities than the pure compounds from Isola cauliflora. At lower concentration of 100-200 ppm, the crude extract of Caulindole, mixture of Caulindole E and F, Pinocembrion and Oxyheptanoid had effect on most of the investigated plant pathogens. Higher concentration of 500-1000 ppm had moderate to weak effect on the Aspergillus spp.
Soil compaction as a consequence of utilization modes
Authors: Gajic Bosko , Dugalic Goran , Sredojevic Zorica
Published: October 2010

Long-standing utilization of agricultural machines in agricultural production leads to a significant increase of compaction in noncarbonate, slightly smonitza - like meadow black soils, in the Kolubara river valley. A substantial increase of compaction in the investigated soils was found in arable and subarable horizons down to the depth of 30 cm. The compaction increase induced negative changes in other most important physical properties of soil, like the increase of bulk density and packing density of soil particles, and the decrease of total porosity, content of pores > 30 mm and void ratio.
Influence of min-a-zel plus and maize meal addition on the quality of lucerne silage
Authors: Djordjevic Nenad , Grubic Goran , Adamovic Milan , Koljajic Viliman
Published: October 2010

The influence of mineral adsorbent Min-A-Zel Plus (5 g/kg) and maize meal (25 and 50 g/kg) used alone or combined, on chemical composition, biochemical changes and quality of lucerne silage was investigated. Based on the obtained data, it can be concluded that addition of Min-A-Zel Plus reduces aminogenesis, while the use of maize meal alone or with zeolite favorable conditions are achieved for lactic acid fermentation, so that the quality of obtained silages is better by one quality class. To achieve better effects of silage quality, the use of combination of mineral adsorbent with carbohydrate additives is recommended.
Influence of selected factors on the viscosity of set style yogurt and acid casein gel at constant speed of spindle rotation
Authors: Fetahagic Safet , Denin-Djurdjevic Jelena , Jovanovic Snezana , Macej Ognjen
Published: October 2010

The influence of milk dry matter (DM) content (8.20%, 9.27% and 10.28%) and applied heat treatments (untreated milk and milk heat-treated at 90oC/10?) on the viscosity of set-style yogurt and acid casein gel gained by acidification with GDL (glucono-d-lactone) has been investigated. Viscosity was measured during the time of 3 minutes at constant speed of spindle rotation of 20 rpm. The results have shown that yogurt samples produced from untreated milk had higher viscosity values than samples produced from heat-treated milk. An increase of dry matter content influenced the increase of viscosity of yogurt samples produced from both untreated milk and heat-treated milk. Samples with 10.28% DM had the highest viscosity values. An increase of DM content in samples of acid casein gel produced by acidification with GDL had an opposite influence. The samples with smallest DM content had the highest viscosity values. There is no linear relationship between the period of storage of set-style yogurt produced from heat-treated milk and viscosity value.
Possibilities for methanol content reduction in plum brandy
Authors: Nikicevic N. , Tesevic Vele
Published: October 2010

Several methods for reducing the methanol content of plum brandies were tried: possibilities for its reduced forming during fruit must alcohol fermentation, and employing effective and rational methods in order to decrease the already existing amount of methanol by applying demethanolization column. Apart from numerous valued components, plum brandy also contains some undesirable ingredients, among which methanol has a special place. It appears during hydrolysis of pectin substances under the influence of the specific pectolytic enzymes, pectyn-methyl-esterasis in particular. A certain amount still has to be present in natural brandies in order to maintain the authentic fruit origin. Reduction of the existing methanol amounts by applying demethanolization column was most effective and came to 43-77% in comparison to the starting amount.
Effects of different substrates on basil seedlings quality (Ocimum basilicum L.)
Authors: Jelacic Slavica , Lakic Nada , Beatovic Damir , Vujosevic Ana
Published: October 2010

In this study five different substrates were used, such as: compost; mixture of compost, Lumbrikus H and garden soil; mixture of compost and Lumbrikus H; mixture of compost, Lumbrikus H and peat Galicina and Seedling Klassman substrate. Basil seedling was produced in containers according to "speeding" system. The studies have shown that the best quality of basil seedling of varieties Genovese and Lattuga is achieved when the mixture of substrates Compost, Lumbrikus H and Galicina peat are applied in the volume proportion of 50% : 30% : 20%.
Possibilities of producing grape-based alcoholic drinks from newly created grapevine varieties
Authors: Nikicevic N. , Jovic S. , Petrovic A.
Published: October 2010

The paper is concerned with investigations on the possibility of producing grape-based alcoholic drinks from newly created grapevine varieties, such as Riesling Italian, Seedling 14660, Muscat Hamburg and Godominka. All chemical parameters for produced grape brandies, marc brandies and wine distillates complied with standards of quality as prescribed by the Regulations for quality of alcoholic drinks. Organoleptic evaluation proved that Seedling 14660 produced best scored wine distillate (17.85), Muscat Hamburg and Godominka gave best scored grape brandy (18.25) and Godominka yielded best scored marc brandy (18.40). Sensory properties of assessed brandies and wine distillate indicate that aroma and quality are gaining in intensity and level of improvement, starting from wine distillate to marc brandies. Also, intensive fruity-floral aroma reminding of lily-of-the-valley and iris fragrance is evident.
A chaotic economic growth model and the agricultural share of an output
Authors: Jablanovic Vesna
Published: October 2010

The agricultural share of a total output generally declines in the process of economic growth. The major reason for this is that consumer demand for food increases only slightly with rising incomes. However, a small, open economy can overcome this constraint to the growth of agricultural production by expanding its net exports. The basic aim of this paper is to set up a chaotic growth model of the gross domestic product that is capable of generating stable equilibria, cycles, or chaos depending on parameter values.
Components of variance and heritability of resistance to important fungal diseases agents in grapevine
Authors: Nikolic Dragan
Published: October 2010

In four interspecies crossing combinations of grapevine (Seedling 108 x Muscat Hamburg, Muscat Hamburg x Seedling 108, S.V.I8315 x Muscat Hamburg and Muscat Hamburg x S.V.I2375) during three years period, resistance to important fungal diseases agents (Plasmopara viticola and Botrytis cinerea) were examined. Based on results of analysis of variance, for investigated characteristics, components of variance, coefficients of genetic and phenotypic variation and coefficient of heritability in a broader sense were calculated. It was established that for both characteristics and in all crossing combinations, genetic variance took the biggest part in total variability. The lowest coefficients of genetic and phenotypic variation were established for both properties in crossing combination Seedling 108 x Muscat Hamburg. The highest coefficients of genetic and phenotypic variation were determined for leaf resistance to Plasmopara viticola in crossing combination Muscat Hamburg x S.V.I2375, and for bunch resistance to Botrytis cinerea in crossing combination Muscat Hamburg x Seedling 108. Considering all investigated crossing combinations, coefficient of heritability for leaf resistance to Plasmopara viticola was from 87.23% to 94.88%, and for bunch resistance to Botrytis cinerea from 88.04% to 93.32%. .
Trends of meteorological elements and recommended grapevine cultivars for the vineyard zone Vrsac
Authors: Petrovic Nevena , Sivcev Branislava , Tosic Ivana
Published: October 2010

Climatic changes on the global level have consequences in changes of meteorological and climatologic conditions in vinegrowing areas. The aim of this paper was to analyze trends of the meteorological elements and determine suitability of growing grapevine cultivar in a viticulture region. Trend analysis was done, based on the data for South-Banat sub-region, an important resource for the production of grapes and wines in Pannonia plain (Vrsac: H=83m, ?=45 09 N, ?=21 19 E). Trend of significance for the 95% level of confidence for mean air temperature and sunshine duration was obtained for the May - June period. For those elements, trend was increasing as well as for the precipitation in September. Correction of cultivar list was recommended, considering the obtained trends of the meteorological elements. The grapevine cultivars that ripen earlier (table and wine cultivars) are recommended, as well as those created at the Faculty of Agriculture, Department for Viticulture. .
Anti-fungal activities of constituents from Uvaria scheffleri and Artabotrys brachypetalus
Authors: Odebode A.C. , Jonker S.A. , Joseph C.C. , Wachira S.W.
Published: October 2010

The anti-fungal activity of schefflone, a mixture of dimmer, 3,5 dimethoxy carvacrol and annonaceous acetogenin, extracted from stem-bark and root of Uvaria scheffleri and Artabotrys bruchypetalus against Fusarium solani, Botryodiplodia theobromae, Asperillus niger and Aspergillus flavus was determined. An in-vitro bioassay showed that the minimum inhibitory effect of the compounds to the fungal pathogens occurred at 200 ppm in both radial growth and mycelia dry weight measurements. Acetogenin from A brachypetalus had a very strong anti-fungal effect on all the test fungi. The effects of the compounds were more pronounced on F solani than on the other. The bioassay methods also play a significant role in the sensitivity of the samples on the pathogens. .
Determination of strontium in drinking water and consequences of radioactive elements present in drinking water for human health
Authors: Rajkovic Milos , Stojanovic Mirjana , Pantelic Gordana , Vuletic Vedrana
Published: October 2010

In this paper the analysis of strontium and uranium content in drinking water has been done, indirectly, according to the scale which originates from drinking water in water-supply system of the city of Belgrade. Gamaspectrometric analysis showed the presence of free natural radionuclide in low activities. The activity of 90Sr in scale which is 0.72?0.11 Bq/kg was determined by radiochemical. Because of the small quantities of fur in the house heater this activity can be considered as irrelevant, but the accumulation of scale can have intensified influence. In this paper, the analysis of effects of the radioactive isotopes presence (first of all 238U and 235U) in drinking water on human health has been done. .
Growth and yield of maize and cassava cultivars as affected by mycorrhizal inoculation and alley cropping regime
Authors: Salami Olusola , Osonuhi Oluuolc
Published: October 2010

Effect of myeorrhizal inoculation and two pruning regimes in experimental alley cropping treatments on the leaf biomass and nutrient yield of sole and mixed Gliricidica septum (a Modulating plant) ami Senna siamea (a non-nodulating plant) were investigated both in the greenhouse and in the field. The impact of the mixtures of these legumes as hedgerows on maize and one cultivar of cassava was also studied on the Held. Gliricidia sepiuni prunnings were found to have high nutrient yields, notably 358.4 kg ha-1 of N and 14.7 kg ha-1 of P as well as fast decomposition and nutrient release. In both Giricidia and Senna. there was similar leaf dry matter values in sole and mixed inoculated or non-inoculated trees for either of the pruning regime and for most of the pruning harvests, although significant differences occurred between inoculated and non-inoculated mixed or sole trees. There was no difference between the total leaf dry matter of the two- and three-month pruning regimes in G. sepium. However, in contrast to G. sepium, the total leaf dry matter of the two-month pruning regime of iS'. sianica was lower than its three-month pruning regime, except for sole non-inoculated trees. Generally, inoculation and mixing of trees in the same hedgerows significantly increased the total N and P yield in G. sepium and S. siantea with greater values in the former than the latter. In G. sephium and except for mixed inoculated trees, while total N yield in the leaf was higher in three-monthly primed than two-monthly pruned trees, the converse was the case for P. For S. siamea the total N and P yield were higher in three-monthly than two-monthly pruned trees. Myeorrhizal inoculations consistently increased the yield of the cassava root tuber and maize grain over their non-inoculated counterparts.
Aggregate composition and stability of structural aggregates of non-calcareous rendzinas in Eastern Serbia
Authors: Gajic Bosko , Zivkovic Miodrag
Published: October 2010

The present study includes the results of comparative investigations of aggregate composition and water stability of structural aggregates in humus horizons of non-calcareous rendzina under native forest and pasture vegetations and the same rendzina utilized long-term as arable field. The results show that aggregate composition and water stability of structural aggregates in the cultivated non-calcareous rendzina are significantly impaired due to a long-term anthropogenization. In the cultivated rendzinas the content of agronomically most valuable aggregates (0.25-10 mm) significantly decreased, while the percentage of cloddy aggregates (>10 mm) was increased about 1.5 to 3.5 times in comparison with the rendzina under pasture and forest vegetations. The structure coefficient of cultivated soils was lower (2.61) than in forest (4.63) and pasture (10.47) rendzinas. The cultivated non-calcareous rendzina had lower (59.12%) aggregate water stability than rendzina under pasture (82.66%) and forest (91.92%). Mean weight diameters of water stable agregates was higher in forest (1.44 mm) and pasture (1.20 mm) than in cultivated (0.65 mm) rendzina.
Effect of natural bio-stimulant and slow-release fertilizers in commercial production of begonia sapling (Begonia semperflorens)
Authors: Vujosevic Ana , Lakic Nada , Lazarevic Slobodan , Beatovic Damir , Jelacic Slavica
Published: October 2010

The present research in the study of the effect of application of natural bio-stimulants and slow-release fertilizers on commercial production of begonia (Begonia semperflorens) saplings. Two types of containers were deployed in the production process, whereas the results of the experimental research showed that the application of both slow-release fertilizers and natural bio-stimulants in further production is only justifiable in cases when largevolume containers are deployed in commercial production of sapling. The application of those significantly influences the increase in stalk weight, number of sprouts and number of blossoms. The application of natural bio-stimulants may be justifiable with the saplings that have previously been produced in smaller containers, since they have auspicious effect upon development of the root, i.e. upon its length.
Quantitative aspects of enterprise rational management in the area of food products supplies management
Authors: Landika Mirjana
Published: October 2010

The total economy is based on the choice between possible alternatives as rational combination of incoming factors with a goal to achieve business optimum. The modern econometry transfers managerial tasks into the language of mathematics and it primarily serves for performing of theoretical results on real examples in a way to balance the constant disequilibria between actual and desired state of business system. The purpose of building and application of model in certain conditions is easier, faster and rational solving of various problems which can be met on all levels of management, and according to their type, specificity and way of solving it is necessary to construct appropriate models. The model of linear programming has wide used application.
The effect of natural biostimulators and slow-disintegrating fertilizers on the quality of rosemary seedlings (Rosmarinus officinalis L.)
Authors: Jelacic Slavica , Beatovic Damir , Lakic Nada , Vujosevic Ana
Published: October 2010

In the present work the effect of natural biostimulators and different doses of slow disintegrating fertilizer on the quality of rosemary seedlings was studied. Rosemary seedlings were produced in containers, according to the 'speedling system'. During the production of seedlings natural biostimulators Megafol and Viva and microbiological fertilizer Slavol were added. The applied biostimulators made a significant effect on the quality of rosemary seedlings. Different doses of the slow disintegrating fertilizer Scotts (Osmocote Extact) were applied (0, 1, 2, 3 and 4 g/l), which also produced a significant influence.
Determination of zones of different plum growing period length in Serbia
Authors: Vulic Todor , Ruml Mirjana , Djordjevic Boban
Published: October 2010

Zoning of Serbia territory was performed according to the length of active period of photosynthesis for plum cv. Pozegaca. Relations between thermal indicators of location and plum growing period length are examined. It was found that the length of growing period is of great extent, determined by the length of frost-free period, as well as by the mean annual air temperature and the mean air temperature for the growing period. The study was carried out using data from 55 phenological and 26 climatological stations in Serbia for the period from 1961 to 1995.
Determination of fluoride content in drinking water and tea infusions using fluoride ion selective electrode
Authors: Rajkovic Milos , Novakovic Ivana
Published: October 2010

Potentiometric analysis of fluoride content (as F- ion) in solutions by using fluoride ion-selective electrode is simple, reliable and cheap. Very small concentrations of fluoride-ions (to 10-6 mol/dm3) can be determined by fluoride selective electrode, with regulation of ion strength of a solution and control of concentration of hydroxide ions and interfering ions of metals. The influence of pH and complexing ions of metals can be successfully regulated by the TISAB solution and by preserving pH value in the range from 5.00 to 7.00. The content of fluorides in the samples can be determined by the method of direct potentiometer, and in the case of very low concentration by standard addition method. In this paper it was analyzed the determination of fluoride ions concentration in bottled mineral waters and water from Belgrade plumbing in two Belgrade districts (Palilula and Novi Beograd) and in tea, by using the fluoride selective electrode. It was determined that the content of fluoride ions in bottled mineral water significantly differs from values given on declaration, and that content of fluoride ions varies over a period of time. The content of fluoride ions in water from plumbing in two Belgrade districts at the time of analysis was significantly increased and exceeded values given in Regulation for drinking water quality. The received results from the analysis of fluorides in teas show that fluorides exist in teas in different concentrations. There are also differences between the same kinds of tea, which is noted with mint (Mentha piperitae folium), as a consequence of differences between soils where it was planted. As taking of fluorides, according to World Health Organisation recommendation (WHO), is limited in the range from 2 to 4 mg per day, it is necessary to give the content of fluorides on all products that are used in human consumption.
Determination of titratable acidity in white wine
Authors: Rajkovic Milos , Novakovic Ivana , Petrovic Aleksandar
Published: October 2010

The amount of titration acid in must is in the largest number of cases with in the range 5.0-8.0 g/dm3. Wines, as a rule, contain less acids than must, and according to Regulations, titratable acidity is in the range of 4.0-8.0 g/dm3 expressed in tartaric acid, because a part of tartaric acid is deposited in the form of salts (tartar or argol) during alcohol fermentation. For wines that contain less than 4 g/dm3 of titratable acids there arises a suspicion about their origin, that is, that during the preparation some illegal acts were done. Because of that, the aim of this paper is to determine titratable acidity in white wine, using standard methods of determination, which are compared with the results received by potentiometric titration using ion-selective electrode. According to the received results it can be seen that wine titration with indicator gives sufficient reliable values of wine titration acidity. However, as potentiometric titration at pH value 7.00 is more reliable and objective method, the values of titratable acids content in wine, expressed through tartaric acid, are given according to this result. The analysis of differential potentiometric curves shows that these curves can give us an answer to the question of the presence of a larger amount of other nonorganic substances, which have already existed in wine. However, none of the used methods gives absolutely reliable answer what substances are present in analysed samples.
Total antioxidant activity (TAA) of bell pepper during prolonged storage on low temperature
Authors: Ilic Zoran , Ben-Yosef Avital , Partzelan Yaccov , Alkalai-Tuvia Sharon , Fallik Elazar
Published: October 2010

Bell pepper (Capsicum annum L.) is a vegetable known for its antioxidant content, highly important for its nutritional values. The total antioxidant activity (TAA) of pepper fruits is measured by TEAC (Trolox equivalent antioxidant capacity). This assay measures both the hydrophilic (HAA) (vitamin C) and lipophilic (LAA)(carotenoids and vitamin E) contents based on the total radical scavenging capacity and the ability of a scaverenge the stable ABTS radical (ABTS + ) described by Vinocur and Rodov (2006). Fruit were cleaned and disinfected with hot water by rinsing and brushing (HWRB) at 55?C as it is described by Fallik et all ., (1999). Tap water wash was served as control. Fruit were stored at 2?C or 7?C during 3 weeks plus 3 days at 20?C (shelf life simulation). TAA in red bell pepper, immediately after harvest, was 4.29 (0.74 lipophilic and 3,55 hydrophilic) mol TE/g fr.wt. After 3 weeks storage at 2?C, TAA in pepper with cold wash treatment was 4.14 and 3.97 TEAC mol TE/g fr.wt. in HWRB treatment. After 3weeks +3days shelf life on 20?C TAA slowly growing up and obtained content of 5.24 in cold wash and 5.16 TEAC mol TE/g fr.wt. in HWRB. This is mainly due to changes in the lipophilic activity-LAA (treatment with cold water-1.79 and 1.81 mol TE/g fr.wt. in HWRB, comparing with 0.74 mol TE/g fr.wt. on beginning of storage). Hydrophilic antioxidant activity-HAA remains practically unchanged. In fruit, stored at 7?C, pepper ripeness has been associated with carotenoids accumulation especially after shelf life, TAA was 5.33 TEAC ( LAA 2.03) mol TE/g fr.wt.
Effect of different doses of slow-disintegrating fertilizer on the quality of impatiens' seedlings (Impatiens walleriana L.)
Authors: Vujosevic Ana , Lakic Nada , Beatovic Damir , Jelacic Slavica
Published: October 2010

The paper studies the effect of applying different doses of slow disintegrating fertilizer 'Scotts' ( Osmocote Exact ) of the formulation 15:9:9:MgO + Me to the quality of impatiens seedlings. The impatiens' seedlings were produced in poly-styrene containers ( speedling system ) and poly-propylene pots ( pot system ). During the seedlings' production, the fertilizer was added in different doses (0, 1, 2, 3, and 4g/l ). The obtained results have shown that the dose of 4 g/l of fertilizer significantly influences on the qualitative features of the impatiens' seedlings.
The definition of electro impulses used in weed control
Authors: Judaev I.V.
Published: October 2010

In modern agriculture the use of chemicals and machines in weed control is not environmental and soil friendly. The use of electro impulses is offered to traditional ways of weed control. The researches done on technical characteristics of such operation and influence of these results on ecology gave picture that the use of electro impulses in weed control is harmless for environment and that is very effective. The basis for the technical project at designing of the electro impulse installation used with standard wheel tractor obtained data about values of electric energy doses that can make damage in various kinds of weeds.
Influence of mixing-distribution trailers design on feed distribution uniformity
Authors: Djevic Milan , Miodragovic Rajko
Published: October 2010

The aim of this investigation was analysis of main mixing-distribution trailer working parameters. This will serve as a base for evaluation of possibilities for obtaining better feed preparation quality on farms, more uniform feed distribution, higher productivity and energy saving. Results have shown that different conceptions of mixing-distribution trailers have different quality of food distribution. Best uniformity of distribution was achieved by using of trailer with horizontal mixing rotor and with tiller for silage cutting and loading.
Energy consumption for different greenhouses' structures
Authors: Djevic Milan , Dimitrijevic Aleksandra
Published: October 2010

In this paper influence of greenhouses' structure was estimated for four different double plastic covered greenhouses in winter lettuce production. Plastic coverings are introduced as mean of making this kind of plant production more efficient. Also, as a mean of lowering energy consumption, the tunnel structures are proposed. Four different double plastic covered greenhouses were used for energy analysis. Two tunnel types, 9 x 58m and 8 x 25m covered with double PE folia, and two gutter connected plastic covered greenhouses. One greenhouse is 2 x 7 m wide and 39 m long and the other 20 x 6.4 m wide and 42 m long. Results have shown the lowest energy consumption for gutter connected greenhouses. Energy out/in ratio was also higher in gutter connected greenhouse. Highest energy consumption was obtained in tunnel greenhouse 8 x 25m.
Hydrophytometeorological indexes of Virginia type tobacco
Authors: Aksic Miroljub , Deletic Nebojsa , Gudzic Nebojsa , Gudzic Slavisa , Stojkovic Slavisa
Published: October 2010

The field trial of Virginia type tobacco (Hevesi-9) was set in irrigation conditions, in the vicinity of Brzi Brod village, Nisava River's valley, on the alluvium soil type. Water consumption for evapotranspiration, at the irrigated variant and the control one, was calculated for each month and the whole vegetation period, by making the balance between water consumption from the soil layer to 2m under the ground, total precipitation amount in the vegetation and water added by irrigation. Hydro-phyto-meteorological indexes of Virginia type tobacco were calculated in regard to air temperature, relative air humidity, air humidity deficiency, sunshine duration and global radiation. Among the six meteorological elements (the above mentioned five and wind speed) analyzed in the studied period, the highest level of correlation with tobacco ETP was shown by air temperature (r=0.88), so the use of hydro-phytotermic index could be recommended for calculation of potential evapotranspiration in irrigation practice.
Estimation of chemical availability indexes of soil nitrogen
Authors: Kresovic Mirjana , Licina Vlado , Mladenovic-Antic Svetlana
Published: October 2010

The researches were performed on brown forest soil used within stationary experiment with a certain fertilizing system for more than 40 years. Researches were made on experiment variants where the increasing dosage of nitrogen fertilizer was applied. The aim of the research was to establish which plant and soil parameters (pots and/or field) might be considered reliable to evaluate values of applied chemical methods (hot water method and easily hydrolyzing nitrogen), being methods used to evaluate potentially mineralized nitrogen in soil. We also wanted to establish the most favorable time to evaluate the values of applied methods (March, July and October). On the basis of established correlation dependences, the plant and soil parameters, either from pots or fields should be used to evaluate the reliability of the hot water method and the reliability of mentioned methods can be estimated in March, July and October. As for the evaluation of easily hydrolyzing nitrogen, we can use both plant and soil parameters in controlled conditions and in the field and the most suitable time is in spring (March) and in fall (October).
Result of subsoil irrigation research of alfalfa grown for green feed in Volgo-Akhtubinskaya flood plant
Authors: Akhmedov Askar
Published: October 2010

Relevance of subsoil irrigation usage for growing feed crops on alluvial meadow soils is shown. Distribution of pjezometric pressure, along the water emitter line during the irrigating period, is analyzed. Formation of moisture patterns in the soil regarding the quantities of irrigating water and emitters design are considered. In order to define the characteristics of moisture patterns in the soil, depending on the quantities of irrigating water, the ratios of vertical water spreading Kv and forms Kf are calculated. Expediency of usage low irrigating rates is substantiated. As a result of research, mathematical relations were derived in order to define water outlays in the emitters made of pottery tubes with diameter 50 mm under water pressure at the line 0.1?0.7 m. It is determined that usage of subsoil irrigation allows increase of commercial crop harvest, significantly save water resources, labour and energy comparing to sprinkling.
Economic effects in tobacco seedlings' production
Authors: Kulic Gordana , Rajic Zoran , Ikanonovic Jela , Glamoclija Djordje , Nedeljkovic Marija , Radanov Ivana
Published: October 2010

Production of occidental type of tobacco seedlings (Barley and Virginia) in our country, so far has been organized in traditional way. It considered tobacco seedlings production in semi hot hotbed, which has been heated with manure. Tobacco seedlings' production in qualitatively new way considers seed sowing in Todd's systems. The goal of this kind of researches is to compare these two ways of seedlings' production in economic way, i.e. determination of production's total costs when product is produced by traditional and by modern way, in Todd's systems.
Sources, nutritional and health values of ω-3 and ω-6 fatty acids
Authors: Milovanovic Mirjana , Vucelic-Radovic Biljana
Published: October 2010

Because of the importance of functional food factors for the nutrition of humans and animals, an increasing scientific interest has emerged in health related effects occurring as a consequence of their content in diet. Therefore, in this paper we tried to present the state of the art concerning nutritional aspects as well as health benefits of the most important and widespread ?-3 and ?-6 fatty acids. Furthermore, we reviewed nonfish alternative sources of ?-3 and ?-6 fatty acids as well as their occurrence in domestic oil seeds, rare and medicinal herbs. Recent attempts to incorporate higher levels of ?-3 fatty acids into food and feed are also presented. .
Correlation between heterosis and genetic distance based on SSR markers in sunflower (Helianthus annuus L.)
Authors: Gvodzenovic Sandra , Pankovic-Saftic Dejana , Jocic Sinisa , Radic Velimir
Published: October 2010

The objective of this study was to determine the correlation between SSR based genetic distance (GD) of new NS sunflower inbred lines and heterosis for six agronomic traits. Twenty three sunflower inbred lines (20 restorer lines and three female lines used as testers) and their hybrids were examined for plant height, head diameter, thousand seed mass, oil content, seed yield per plant and oil yield per plant. Significant heterosis was observed in hybrid combinations for all examined traits except oil content. Genetic distance between pairs of tested sunflower inbred lines ranged from 0.13 to 0.8. There was no significant positive correlation between genetic distance and mid- and better-parent heterosis, specific combining ability and mean value in any of the examined traits for all 60 hybrids. A highly significant negative correlation was found between GD and mean oil percentage (r=-0.33 p<0.01). Although GD was generally a poor predictor of heterosis, better results are obtained if hybrid combinations for each tester and each trait are analyzed separately.
Groundwater types in Southeast Srem
Authors: Gregoric Enike , Djurovic Nevenka , Rudic Dragan , Pocuca Vesna
Published: October 2010

The region of Southeast Srem is rich in ground waters, which is of great significance to agricultural production. The objective of this paper was to designate the zones of different groundwater types from the aspect of recharge, based on the analysis of groundwater regimes in the study area. A very complex groundwater regime in Southeast Srem, which depends on a great number of natural and some anthropogenic factors, makes it difficult to designate clearly the zones of the three main types of groundwater regime. Still, the boundaries of the zones of groundwater regime types were defined based on the results of correlation analysis of the basic factors affecting the groundwater regime. Zone I includes the climatic type of groundwater. Its fluctuation corresponds to the vertical factors of water balance (precipitation and evaporation) and it is not affected by the river water level. This zone extends North and East of the line Putinci, Golubinci, Stara Pazova, Batajnica, Dobanovci, mainly in the area of the loess plateau. Within the zone, groundwater is at a relatively great depth. Only exceptionally, in the valleys, it appears almost on the surface. Zone II includes the climatic-hydrological groundwater type, which is the transition between the climatic type and the hydrological type. The fluctuation of groundwater regime is affected both by the effect of vertical balance factors, and by the effect of watercourses. Climatic-hydrological groundwater type covers the central and the lowest part of the study area and the South part of the middle terrace. Zone III is classified as the hydrological groundwater type and it covers the riparian areas along the Sava and the Danube. The aquifer is hydraulically connected with the river Sava.
Comparison of different side-dressings on winter wheat yield
Authors: Stipesevic Bojan , Stosic Miro , Teodorovic Bojana , Jug Irena , Jug Danijel , Simon Misko , Bede Zvonimir , Simic Milena
Published: October 2010

The trial with different side-dressing fertilizations for winter wheat has been conducted at Vetovo site, Croatia, in vegetation seasons 2007/08 and 2008/09. The five side-dressing fertilizations has been tested (Control - no sidedressing, KAN - 100 kg KAN ha-1 in tillering and jointing stages; M1 - 8 l of foliar NPK fertilizer 'Profert Mara' ha-1; M2 - 16 l ha-1 of foliar fertilizer, and; M3 - 24 ha-1 of foliar fertilizer) at four winter wheat cultivars (Anika, Fiesta, Gabi and Rapsodija), with previously applied 400 kg NPK 7:20:30 ha-1 for all treatments. Results showed that all foliar side-dressing treatments gave winter wheat grain yield higher than the control, and that M1 treatment showed equal in comparison with KAN side-dressing. Treatments M2 and M3 had, in comparison with the control, KAN and M1 treatments, higher yields which leads toward conclusion that foliar treatments can be recommended for side-dressing for given agroecological conditions.
A model of correction indexes determination for Virginia type tobacco on the basis of field measured ETP
Authors: Aksic Miroljub , Deletic Nebojsa , Gudzic Nebojsa , Gudzic Slavisa , Stojkovic Slavisa
Published: October 2010

Numerous methods of calculating ET0 and ETP offer a great practical possibility for their application, but in order to improve their efficiency it is necessary to check them in particular regions. The experimental study of Virginia type tobacco in irrigation conditions was carried out in the area of village Brzi Brod (Nis). The established potential evapotranspiration of Virginia type tobacco ranged from 498.1-512.7 mm, depending on annual weather conditions. Highly significant correlation coefficients were found between the directly observed ETP of Virginia type tobacco and reference evapotranspiration (ET0) calculated by the following methods: FAO-56 Penman-Monteith (r=0.88), FAO-24 Radiation (0.79), FAO-24 Blaney-Criddle (r=0.85), Tornthwaite (r=0.90) and Hargreaves (r=0.76). The established correction indexes for translation of ET0 calculated by each method were the following: FAO-56 Penman-Monteith - 0.91; FAO-24 Radiation - 0.76; FAO-24 Blaney-Criddle - 0.89; Tornthwaite - 0.92; Hargreaves - 0.72.
The determination of titratable acidity and total tannins in red wine
Authors: Rajkovic Milos , Sredovic Ivana
Published: October 2010

Titration acidity and content of total tannins in mass-market red wines are analyzed in this paper. The content of total acids in wine, expressed through wine acid, was analyzed by potentiometric titration on 7.00 pH value. According to titratable acidity in analyzed wines, all wines (only) with analyzed parameters according to Regulations about wine quality. The analysis of differential potentiometric curves shows that these curves can give the answer to the question if non organic substances, amino groups and phenols are present in wine in large quantity, as they are always present in wine. However it doesn't give the clear answer which substances are present in analyzed samples. The answer to this question can be received only by the method of ionic chromatography. The content of total tannins shows short time of storage in wine cellars so wine wasn't stored long enough, i.e. they are commercial wines made for mass market production and consumption. Although they have less content of total tannin materials of given values, wine taste gives the correlation with other polyphenol materials that only give odour, aroma and 'bouquet' to wine. The relative error of mean value is very low which indicates the reproduction of results and reliability of the method of determination of total tannins in red wine.