Search

Published After
Published Before

Search Results

  • Utilization of urban sewage waters for irrigation of agricultural lands in Ukraine
    5-7
    Views:
    116

    The research results of ecological passportization for the municipal treatment facilities sewage disposals were presented (its chemical composition and sanitary measurements). There were determined the availability of the sewage disposals for irrigation and the prospects of use in agriculture.

  • Macro element contents of different genotype cows’ milk
    27-31
    Views:
    133

    The level of mineral elements is important factor regarding the quality of milk. The aim of our research study was to determine the content of mineral elements in milk of Holstein, Jersey, Brown Swiss, Ayrshire, Norwegian-red, Swedish-red cows in the first stage of lactation. All cows were fed with the same type (composition) of feed and they were kept under the same condition. The concentration of macroelements (K, Na, Ca, P, Mg, S) in digested milk samples was determined by inductively coupled plasma optical emission spectrometry (ICP-OES).

  • Effect of agrotechnical factors on the activity of urease enzyme in a long term fertlization experiment
    43-48
    Views:
    133

    The soil is a natural resource, the fertility preservation is an important part of the sustainable development. We have to monitor the transformation dinamics of the organic nitrogen-containing substances, to get accurate information about the changes of the nitrogen cycle in the soil.

    Physical and chemical properties of the soil and the microorganism effect on the organic matter in the soil – in addition to the composition of organic matter. Wide variety of extracellular enzymes are present in this decomposition. These enzymes help in the transformation of the macromolecules to transforming low molecular weight compounds so they will be available during the assimilation.

    The urease enzyme, catalyzes the hydrolysis of urea to CO2 and NH3. The urease is widely spread in the nature, it is present in the microorganisms, plants and animals.

    We found that the soil moisture content, the rotation and the fertilization affect to the amount of urease in spring. Furthermore, we get significant difference between the irrigated and non irrigated samples in the second period of the year. Based on our results we can state that the activity of urease was higher in spring 2014.

    The objective of our study was to present how the different agronomic factors affect on the activity of urease in a long term fertilizationexperiment.

  • The effect of β-glucan, carotenoids, oligosaccharides and anthocyanins on bacteria groups of excreta in broiler chickens
    15-20
    Views:
    202

    This study was conducted to examine the effect of natural compounds, such as β-glucan, carotenoids, oligosaccharides, and anthocyanins in the diet on bacteria gropus of excreta in Ross 308 broiler chickens. Chickens were fed 5 diets: control (basal) diet, a diet supplemented by β-glucan at 0.05%, and diets supplemented by carotenoids, oligosaccharides, or anthocyanins at 0.5% of each compound. On experimental day 19, excreta were collected to determine the proportion of Lactobacillus, Bifidobacterium, Campylobacter, Clostridium, and Escherichia coli. Samples were collected aseptically and snap-frozen in liquid nitrogen. Bacterial DNA was isolated from samples, then polymerase chain reaction using primer pairs designed to the 16S rDNA of bacterial groups were applied to define the proportion of the mentioned bacteria. Another universal primer pair was used to amplify a region of 16S rDNA of all the examined bacteria. Proportion of each bacterial groups was determined relatively to the intensity of universal PCR product band by gel documenting system and ImageLab software. Based on the results, carotenoids and anthocyanins increased the proportion of Bifidobacterium, which might imply the beneficial effects of the mentioned compounds on the bacteria composition of excreta.

  • Examination of motivation in civic organizations
    73-79
    Views:
    103

    The primary objective of my research is to examine and explore the specialties of the civil organizations composition and operation. In my study I describe the results of my research in Hajdú-Bihar County. The results concern to the features of motivation and incentive in civil organizations.

    Quantitative data from an empirical analysis is used for the research. My questionnaires were measured on a representative sample. The basis of this sample was the County Court of Justice’s website. Thus, my research on managerial tasks included in Hajdú-Bihar County. During the survey I examined the motivation from different sides. First of all, what was the purpose of establishing civil organizations? I also analysed the managers’ motivation. Why they participate in civic activities? Finally, I examined the perception of managers of incentive forms. The general findings beyond the context of the investigations were carried out on the basis of organizational parameters and characteristics of the interviewees.

    The results of my research arise from an analysis of data I collected. Civil organizations are established for a well-defined task or as a way of problem-solving. In terms of internal motivation of managers stated that it was mainly an internal urge and desire to help the cause, participate in the activities of civic organizations. In their motivational activities, the psychological incentives were classified as most effective motivators.

  • Comparative analysis of inoculated soybean in extinguishing soil
    113-116
    Views:
    210

    In order to achieve higher yields, better technological methods offered in the current market, which aims to help the producers in the realization. To guarantee good yield because more and more people try with a variety of products, but you have to make the expected impact falls short.In this experiment, the following results were obtained: the soil suspension closely related to the inoculum of seed or seed treatment,which affects the soybean nodule formation, core saturation, and yield and protein-oil indicators. The soil suspension composition may exert positive and negative effects, which depend on how bacterial strains inoculum combined on the soybean seed surface. It is shown in our experiment very well, that between inoculum and inoculum as well as inoculum and seed treatment materials may be antagonism which setback to the soybean nodules formation and the yield, but not worsen the protein-oil indicators.

  • Unraveling changes in the duck microbiome and inflammatory processes due to allithiamine-enriched feed
    163-171
    Views:
    46

    The gastrointestinal tract of poultry harbors a diverse and intricate microbiome that plays a crucial role in nutrient digestion and absorption, immune system development, and enhances resistance against pathogens. Maintaining a healthy state and proper production is fundamentally determined by the symbiosis between the host and microbes. Due to genetic and technological improvements, intensive growth rate can be associated with many pathological conditions, such as increased susceptibility to infections. Intestinal inflammation in poultry industries detrimentally affects productivity by hindering nutrient absorption and the efficient allocation of nutrients for growth. The host releases different biomarkers in response to inflammation. Hence, there is an utmost interest of reliable, precise, sensitive and robust biomarkers to evaluate both the gastrointestinal health status and inflammation in poultry. The aim of this study was to determine how the developed feed prototype (allithiamine) affects the community diversity in raised duck, and the relationship between gut microbiome composition and inflammatory factor as calprotectin, using targeted 16S rRNA gene amplicon sequencing and Chicken Calprotectin ELISA Kit.

  • Effect of raised level α-linolenic fatty acid diet on broiler meat quality
    29-33
    Views:
    94

    The aim of our investigation was to determine the effects of increased α-linolenic content in food on the colour, total pigment content, organoleptic characteristics and oxidative stability of poultry meat. The experiment was carried out with 1200 Ross-308 cock chicklings. Birds were fed three-phase diets, contained four different fat sources: lard, sunflower oil, flaxseed oil and soybean oil. According to the experiment, the different oil sources had no effect on growth performance, but the fatty acid composition of diets was reflected in the meat fatty acid profile. We could detect just slight change in colour in the treated meat, which was not caused by the decreased pigment content. The detected change in colour during the storage was not in relation to initial PUFA content. TBA level did not prove the accelerated lipid peroxidation which was expected in case of higher α-linolenic containing the meat. The data obtained in meat storage trial, could not prove clearly the negative effect of the higher α-linolenic content of the meat.

  • Analysis of vitamin E content in pilot dairy products
    31-34
    Views:
    125

    Within the framework of Ányos Jedlik program we started an experiment on feeding anti-oxidants with dairy cows at Körös-Maros Biofarm Kft. The purpose of the experiment was to test whether vitamin E and selenium fed as feed-supplement have an effect on the composition of milk produced. Furthermore we examined the cheese and yoghurt made out of the milk to explore how much vitamin E and selenium is retained in the products after processing. Our goal is to develop such functional dairy product which can be part of the daily diet helping us to remain healthy.
    After analyzing the data we found out that the anti-oxidant fed to the cows resulted in elevated vitamin E and selenium levels in the milk and that these were retained in the cheese and yoghurt in relatively large amount.

  • Measurement of degradation on under-utilized natural turf
    115-121
    Views:
    137

    The role of turf serving animal husbandry is significantly declining with the decreasing number of grazing livestock in Hungary. Accordingly, the area of under-utilized or non-utilized turfs is increasing. At the University of Debrecen, Institutes for Agricultural Research and Educational Farm, Karcag Research Institute we studied four types of turf utilization in three repetitions on a salt meadow with Alopecurus pratensis. As a result of the performed examinations, we identified the composition of the flora structure on the investigated area and we measured carbon-dioxide circulation and soil moisture.

  • Possibilities of conceptualization and operacioanlizaton of the safety culture and safety climate in the international safety management researches
    117-126
    Views:
    64

    In this paper the author summarized the definitions and operationalisations of the safety culture and safety climate concepts. He analyzed the Hungarian and international safety
    management scientific literatures. He also analyzed the scientific definitions and summarised the common and different elements. The author emphasizes that the many different scientific safety culture researches had been created good possibilities to find the common surfaces. Based on the international safety culture operationalisation practices the author identified a composition of safety culture dimensions which could be a possible basis for the Hungarian safety culture researches. These dimensions are:
    ???? values (individual and organizational) from this result scale of values,
    ???? attitudes (individual and organizational),
    ???? motivations,
    ???? perceptions,
    ???? social status and estimation of the occupational safety and health,
    ???? position and estimation of the occupational safety and health communication,
    ???? position and estimation of the occupational safety and health tranings,
    ???? measuring of confidence, optimism, fatalism and anomic characteristics,
    ???? good practices and behavior,
    ???? influence and estimation of the work,
    ???? risk perception and safety level perception,
    ???? contentment.with occupational safety and health.

  • Application of the SDS-PAGE method for the characterisation of winter wheat flour quality
    112-118
    Views:
    116

    The principle, development and importance of the SDS-PAGE method are presented in this article. The SDS-PAGE method has become one of the basic methods of molecular biological research, because it is widely applicable and its sensitivity is excellent in the separation of wheat storage proteins.
    We have shown the application of this method with a concrete example. It was also tested whether, it was possible to obtain a better baking quality product from a large amount of poor quality less valuable wheat by fractioning the flour according to particle sizes after grinding. We studied the rheological properties of flours with different particle size fractions from the original flour. The baking quality of the original flour was B2. The 125-90 and 90-63 μm fractions have significantly better baking quality (B1) than the original flour. The protein contents of these flour fractions were also significantly higher than the protein content of the original flour. We had a question: what has influenced the baking quality: the protein content or other factors? We searched for an explanation on these results in the protein composition of the flour samples. We studied the distribution of glutenin-fractions by SDS-PAGE method and evaluated them. We found with correlation analysis that the amount of LMW-Glutenin D-group (52-60 kDa) is in a strong, negative correlation to the baking quality (r = – 0.855*). Therefore, the baking quality of flour samples was influenced by this glutenin fraction.

  • Analysis of the main parameters of spring and summer food compound of roe deer (Capreolus capreolus L.) on the two hunting grounds of the Alföld plain
    7-10
    Views:
    103

    It is widespread that roe deer are very choosy. It needs this sorting because the micro organisms, which help the digestion of high fibre plants, are missing in its stomach that is why they are mostly called „concentrate selectors” (Hoffmann, 1985, 1988, 1989).
    These animals should mostly eat easily digestible plants with high nutrition level (pulses, buds, sprouts and flowers), and they are able to do this sorting because of their small mouth size. In winter there is a lack of these plants, so the high selectivity occurs only when the feed is in abundance.
    Examining the amount and quality of vegetation available on the habitat of roe deer we can identify the species which can satisfy their feed demand. It is known, that roe deer as other large ruminants, from the plant abundance prefer certain plants and plant parts while there are others which are avoided. The identification of the eaten species and the rate of their occurrence in the feed is the first step to become acquainted with the
    interaction between animal and the surroundings.

  • Leaf protein analyses in order to utilise the leaf shoot of artichoke
    43-47
    Views:
    141

    The constat growth of the Earth’s population brings with itself a higher demand for food and protein not only in human nutrition but also for the feeding of livestock. Currently, the feed industry is mainly built onseed-based protein, wherethebaseplant is soybean, which is large lycovered by imports in Hungary, similar toother European countries. However, the long-term economically sustainable lifestock breeding demandschanges which has also worked out strategies. An alternative protein sources could be green leafy plants.

    In current work the Jerusalem artichokes as an alternative source of protein was studied, compared to alfalfa as a valuable protein plant. Our results indicate that fiber fraction ofJerusalem artichoke shootswas 34 to 37% after pressing in the autumn period while alfalfa slightly lower values were obtained (30%). On the other hand extracted green leaf protein concentration was higher in alfalfa than in Jerusalem artichoke. Along with this higher protein content could be measured from the leaf protein concentration of alfalfa and almost each amino acids were more, as well comparing to Jerusalem artichoke.

    Overall, the alfalfa proved to be advantageous as expected both in leaf protein extraction efficiency, both regarding the content of the protein in the Jerusalem artichoke. However, considering aminoacid composition and green biomass production, Jerusalem artichokecould be a promisingplant species asplant protein sourceinthefuture.

  • The effect of foreign stallions on the Hungarian Furioso-North Star breed
    67-70
    Views:
    152

    The most common aim of animal conservation programs is to maintain genetic diversity. Furioso-North Star is an indigenous Hungarian horse breed originated from Mezőhegyes Stud. The breed is based on two founder stallions, Furioso Senior and North Star Senior. The aim of this research study was to analyze the effect of the foreign breeding stallions to the genetic structure of Hungarian Furioso-North Star breed. The genetic structure of the breed was studied from pedigree data what was received from the Furioso-North Star Horse Breeding Association. Foals born between 2015–2018 were chosen as reference population. Every breeding stallion was marked by nationality (Austrian, Czech, German, Hungarian, Romanian or Slovak) according to their birth place. The population was described with genetic variability, what was calculated using Endog software. The Furioso-North Star breed is popular in Central Europe and nearby countries. The stallion imports and the stallion transfers were necessary and useful as they made changes in the composition of the genetic variability. The new genes and the new lines have refreshed the genetic structure. There were several breeds, like the Nonius, Shagya Arabian and English Thoroughbred, whose had an impact on the genetic structure of the Furioso-North Star breed.

  • The noise monitoring system of Debrecen International Airport and requirement of appointing noise protection zones, regarding to the growing air traffic
    191-194
    Views:
    113

    The Debrecen International Airport has been undergoing a significant transformation regarding to the growth of traffic and its composition. Considering the dwelling zone location of the airport we cannot avoid the possible noise pollution that it may cause, since its permanency, and growth of intensity, could be the reason of durable health deficiency. The airports’ noise pollution zones are determined, and classified by domestic, and international regulations, the measured data of the noise monitoring system, and the content of the air traffic regarding to the type of planes. Summoning all of these we recommend the D zone qualification of the airport, and the traffic daylight restriction referring to the S5 type of planes. We also advise to build up a more sophisticated and wider extended noise monitoring system.

  • Determination methods of quality parameters of Prunus cerasus
    107-111
    Views:
    152

    Sour cherry (Prunus cerasus) is a non-climacteric fruit. Storage optimization would enable the expansion of fresh consumption. The quality parameters are required for storage optimization. Those parameters are sugar content, acid composition, mineral content and alcohol content,
    moreover it is also planned to determine antioxidants, vitamins and patulin mikotoxin under different conditions. In this paper, we demonstrate the measurement options of these parameters.

  • Regulation in Hungary of the Use of Waste Water and Sewage Sludge in Agriculture
    143-149
    Views:
    115

    Regulating the use of waste water and sewage sludge in agriculture in such a way as to prevent harmful effects on soil, vegetation, animals and man.
    In European Union there is a Council Directive (86/278/EEC) on the protection of the environment, and in particular of the soil, when sewage sludge is used in agriculture.
    In the enlargement process of the European Union the Hungarian Government created a new rule (50/2001. (IV. 3.) Government regulation) which regulate using of waste water and sewage sludge in agriculture. This Hungarian rule is legal and reconcilable with the Council Directive.
    The Regulation lays down limit values for concentrations of heavy metals in the soil, in waste water, in sludge and for the maximum annual quantities of heavy metals which may be introduced into the soil.
    Waste water, sludge and soil on which it is used must be sampled and analysed.
    Sewage sludge must be treated for six months before being used in agriculture.
    The use of waste water and sludge prohibited on grassland, on nature reserved areas, in ecological farming, and soil in witch fruit and vegetable crops are growing, with the exception of fruit trees.
    The states soil conservation authority must keep records registering the following:
    – the quantities of waste water and sludge produced;
    – the composition and properties of sludge;
    – the type of treatment carried out;
    – the names and addresses of the recipients of the sludge and places where the sludge is to be used.
    The Government every four years must prepare a consolidated report on the use of sludge in agriculture, specifying quantities used, criteria followed and any difficulties encountered. This report must be forwarded to the Commission.
    Last but not least in the light of Member States reports, the Commission will if necessary submit appropriate proposals for increased protection of the soil and the environment.

  • Analysis of vitamin E content in pilot dairy products
    49-52
    Views:
    177

    Within the framework of Ányos Jedlik program we started an experiment on feeding anti-oxidants with dairy cows at Körös-Maros Biofarm Kft. The purpose of the experiment was to test whether vitamin E and selenium fed as feed-supplement have an effect on the composition of milk produced. Furthermore we examined the cheese and yoghurt made out of the milk to explore how much vitamin E and selenium is retained in the products after processing. Our goal is to develop such functional dairy product which can be part of the daily diet helping us to remain healthy.

    After analyzing the data we found out that the anti-oxidant fed to the cows resulted in elevated vitamin E and selenium levels in the milk and that these were retained in the cheese and yoghurt in relatively large amount.

  • Review on the fatty acid profile and free fatty acid of common carp (Cyprinus carpio)
    99-105
    Views:
    112

    Carp or ponty in Hungarian, is considered commercial freshwater fish, which is an adaptable species in both wild and cultured conditions. Carp has high nutritional value content, favorable taste, it is rich in protein, and low in saturated fat. The nutritional content in fish is composed of many chemical constituents and influenced by many factors. One of the components that its content may be different due to internal and external factors is fatty acids, which may vary depending on endogenous and exogenous factors. The endogenous or internal factors include the genetic, size, sexual maturity, and life cycle phase. While microclimate, water quality, quality of food or diet habit, and the amount of available food or starvation are considered as exogenous or environmental factors. Freshwater fish has the ability to convert essential fatty acid into long chain polyunsaturated fatty acid like AA, EPA, and DHA. Most results showed that palmitic acid and oleic acid were the dominant SFA and MUFA in carp both for wild and farmed carp in all seasons. The PUFA for wild carp was mainly dominated by DHA, while on farmed carp by LA. It confirmed that high LA content in farmed carp was related to the diet habit. The amount of lipid and FA were changed in line with the season. Even the statistical analysis showed no significant difference, but some studies showed a contrasting result. Moreover, most obtained results acknowledged that FA tends to decrease during the spawning period. The amount and composition of FA were affected by the total lipid content. The lipid must be broken down into simpler compounds such as FA or FFA for the metabolism of fish. The result of metabolism then transported into the utilising tissue and used as energy.

  • Investigation of the effects of biggame-preserves on forests with different species composition
    21-24
    Views:
    144

    Hungary is well known for its high level game management. In order to develop a concentrated and more profitable gamemanagement new game preserves were established in the last few years. According to the law, in the game-preserves the game bearing capacity is not the most important parameter, because in these areas the feeding is continuous. In practice it means that in gamepreserves we find a much higher density of games than in nature. This causes a relative big loading of the area (of the herbaceous and arboreal), where the game-preserves are located.
    Our aim is to study the ecological and management issues of forest- and game resources. The scene of these work is a gamepreserves related to the Nyírerdő Corporation (Nyíregyháza). We made forest structure survey to determine the main stand-forming tree species in the area of the game preserves as well as to estimate the number of the measuring points.

  • A growth model to predict body weight and body composition of broilers
    17-24
    Views:
    339

    Models predicting the nutrient partitioning and animal performance have been developed for decades. Nowadays, growth models are used in practical animal nutrition, and they have particular importance in precision livestock farming. The aim of the present study was to introduce a broiler model and to provide examples on model application. The model predicts protein and fat deposition as well as the body weight of an individual broiler chicken from digestible nutrient intake over time. Feed intake (FI) and the digestible nutrient content of the feed are inputs as well as some animal factors like: initial BW, feed intake at 1 and 2 kg of BW, precocity and mean protein deposition. The protein and energy metabolism is represented as in the classical nutrient partitioning models. The protein deposition (PD) is driven by digestible amino acid supply and is under “genetic control”, the so-called potential PD limits the actual PD if protein is oversupplied.

    The authors discuss how the model can be used to simulate the animal response upon different scenarios. Examples are given to show that the diet might be limiting if some animal trait is changed. Applicability of the model has shown through running the model by using different feed strategies (three- vs five-phase-feeding) and variations with animal factors. In conclusion, growth models are useful tools to support decision making for defining the most suitable feeds used in a broiler farm. The model presented in this paper shows a high sensibility and flexibility to test different scenarios. By challenging the model with different inputs, the animal response in terms of changes in body weight and feed conversion can be understood more by studying the shift in deposition of chemical constituents. The examples provided in the present paper shows the benefit of using mathematical models and their applicability in precision nutrition. It can be concluded that the growth model helps to apply “from desired feed to desired food” concept.

  • Effect of different n-6/n-3 fatty acid proportion oil sources on reproduction performance and fatty acid profile of milk in modern genotype sows - Pleminary results: Preliminary results
    121-128
    Views:
    144

    This study was conducted to investigate the effects of supplemental n-6 and n-3 fatty acids on sow’s milk fatty acid composition during the lactation period and on reproductive efficiency of sows in the subsequent gestation period. Data were collected on a total of 213 DanBred sows (108 control and 105 experimental) representing parity of 2–7, respectively. Control and experimental sows were placed in the same housing conditions during lactation and gestation period. Control group received 6.3 g of sunflower oil (SO) per kg feed as n-6 fatty acid supplementation, whilst experimental animals received the same amount of fish oil (FO) as n-3 fatty acid source. Diets were corn meal-extracted soybean meal based. The experiment was conducted in one replication as being a part of a longer and more comprehensive trial. It was found that the consumed long-chain polyunsaturated fatty acids (LC-PUFAs) appeared in the sow’s milk and changed its fatty acid profile. With this alteration, the n-6/n-3 ratio of experimental (FO) sows’ milk were narrower than in SO group (SO: 13.82 vs. FO: 5.89). The benefits of n-3 fatty acids supplementation were evident for the subsequent reproduction cycle, when experimental sows heated more reliable and earlier than control (weaning to oestrus interval: SO: 5.86 vs. FO: 4.48 days). Only 2.33% of experimental sows (FO) did not heat within 7 days after weaning, but this was 12.36% in the control group (SO). The present study requires further research to evaluate the effect of n-3 fatty acids on maintenance of pregnancy and improved subsequent litter size.

  • Study of some cooking and eating quality characters on some Egyptian rice genotypes
    77-82
    Views:
    137

    Some Egyptian rice genotypes [i.e. Japonica (Sakha 104), Japonica/Indica (Egyptian hybrid1) and Indica (Giza 182)] were investigated to evaluate the cooking and eating quality characters. High significant differences in grain shape were observed among rice genotypes. Hulling, milling and head rice percentage were higher in Sakha 104 than other rice genotypes, while Indica type (Giza 182) recorded the lowest values in milling and physical characters. No significant differences were found in chemical composition of the three genotypes of rice was recorded, but Giza 182 had the highest protein content. All Egyptian rice genotypes were low in gelatinization temperature and soft in gel consistency. Japonica and Indica rice varieties were low in amylase content, while Japonica/Indica rice variety was intermediate. The use of RVA is considered a good index for palatability evaluation for milled rice flour and starch. The Indica and Japonica/Indica types are low in breakdown viscosity, but higher in cooked pasta than Japonica type. Japonica type recorded the best score in panel test, followed by Indica type, while Indica/Japonica rice variety was the least accepted by Egyptian consumer.

  • Effect of year and irrigation on yield and quantity of different potato varieties
    7-14
    Views:
    84

    dramatically in the last few decades. We are lagging behind Western European countries as regards yields. The ecological conditions are not favourable for potato, but the low yields other causes: the use of non-suitable seed, the low level of irrigation and nutrient supply and out of date machinery. The competitiveness of production is further decreased by the great alternation in yields from year to year, unpredictable market conditions, poor consumption habit, and often the lack of quality products.
    The experiment was carried out at the experimental site of the University of Debrecen, Farm and Regional Research Institute, at Látókép. In our experiment, we examined the yield and selected quality parameters of 9 medium-early varieties in large parcels. Of the examined varieties, 3 are of Dutch, and 6 are of Hungarian breeding.
    The experiment was set up in 2004 and 2005, on 50 m2 parcels on calcareous chernozem soil after winter wheat (2004) and two rowed barley (2005) as a forecrop. The varieties were examined in 4 repetitions in randomized blocks, of which two repetitions were irrigated, and two were non-irrigated. We examined the yields of the varieties, the distribution of tubers according to size and their percentages and changes, and selected parameters of quality and chemical composition due to irrigation. We studied the dry matter content, the starch content, the underwater mass, the amount of reducing sugars, and the colour index of frying of the tubers.
    Summary, it can be stated that among the agrotechniques, year effect, variety and irrigation factors have considerable impact on potato yield quality and quantity. However, the impact of irrigation depends on the year effect.