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Application of lead time analysis as a method in EU co-funded mid-term programme evaluations in 2007–2013: the case of Bulgaria and Malta
Published September 18, 2014
9-14

...5); font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">Mid-term evaluation of grant programmes always aims to assess the efficiency of programme implementation. An important aspect of assessing efficiency is the lead times of the application mechanisms. A detailed and objective analysis of lead times may set the scenes for an in-depth evaluation of the relevant entities in the application process in terms of capacity,competences or the process itself. The Bulgarian regional operational programme (OPRD) and the Maltese ESF operational programme (OPII) mid-term evaluations offer an opportunity to see application of this method on the ground with a view on results and comparisons. This article attempts to provide an overview on lead time analysis, being a simple but powerful tool for evaluation with great benefits and also great potential pitfalls in terms of use and interpretation.

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The economic risk analysis in the case of agricultural enterprises
Published March 20, 2013
107-116

...5); font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">The company’s activity, profitability and growth potential are influenced by risk and uncertainty derived from the economic environment. The principal thing that makes difference between risk and uncertainty is the capacity to be quantified, and then the risk can be measured, whereas uncertainty is not. Specific risk types of agricultural enterprises are on the one hand the economic risk and specific risk arising from the main agricultural activity. The economic risks include financial risk categories like market risk, liquidity risk, credit risk and operational risk. Macroeconomic risk manifest also a significant influence to the company and the importance of taking into account of this, importantly increased in recently years. In present paper, I quantified the total risk of company by using financial and operating leverage indicators. The company’s growth was characterized with internal growth rate and sustainable growth rate. The present research aims to explore risk and growth level of agricultural companies and grouping companies by different characteristics. In present analysis I have used cluster analysis. From the results I can summarize, that the agricultural enterprises growth is made by using internal financing resources and their financial leverage level is lower that operating leverage level.

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Identification of the Slovak traditional cheese “Parenica” microflora
Published September 5, 2018
227-239

Numerous studies have demonstrated the higher accuracy, faster time-to-results and lower costs provided by MALDI Biotyper systems compared to classical methods. In this study, the culturable population of total count of bacteria, enterococci, coliforms bacteria, lactic acid bacteria (LAB) and microscopic fungi and yeasts from cow’s dairy prod...ucts was identified using the MALDI-TOF MS Biotyper. Altogether, 50 samples of the Slovak cheese “Parenica” were examined. Total numbers of bacteria were cultured on Plate count agar at 37 °C for 24–48 h, aerobically; enterococci were cultured on Enterococcus selective agar at 37 °C for 24–48 h, aerobically; coliforms bacteria were cultured on Violet Red Bile lactose agar at 37 °C for 24–48 h, aerobically. The LAB were cultured on MRS (Main Rogosa agar), MSE and APT agar at 30 °C in microaerophilic conditions. The microscopic fungi and yeasts were cultured on Malt extract agar at 25 °C for 5 days, aerobically. Isolated strains (total 669) were subjected to identification by the MALDI-TOF MS. Among total count the identified bacteria mostly were Acinetobacter baumannii, Bacillus cereus, Micrococcus luteus and Staphylococcus warneri. Escherichia coli and Enterobacter cloacae were the most abundant coliform bacteria representatives identified. Coliform bacteria included Citrobacter, Hafnia and Klebsiella. Altogether three genera belonged to the LAB – Lactobacillus, Lactococcus and Leuconostoc were identified with Lactococcus lactis, Lactobacillus plantarum, Lactobacillus coryniformis, L. fructivorans and Leuconostoc mesenteroides were considered as the dominated LAB species in dairy products. Among yeasts, Kluyveromyces lactis, Candida zeylanoides and Yarrowia lipolytica were among the most isolated.

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Comparative analysis of maize weed control system and the competitive effect of sorghum
Published November 10, 2010
97-104

In our investigation we used different weed control technologies in the different phenology states of the maize. The experiment have been
carried out in Hódmezővásárhely, in the Experiment garden of the Pilot farm of University of Szeged Faculty of Agriculture, on meadow
chernozem soil, on 24 m2 plots, in 3 replications, ra...ndomized blotch design. The experiment can be regarded as 15 weed-control strategies
where, in addition to the untreated control, six chemicals or chemical-combinations are applied (Spectrum 720 EC, Motivell Turbo D,
Stellar + Dash HC, Clio + Akris SE + Dash HC, Clio + Dash HC) in five different times (pre, early post, post and two late post) and eight
mechanical weed-control technologies were used. Hoeing took place connected to the herbicide treatments in different times: until 2-3-leave
age weedless, in 3-4-leave age hoed once, from 3-4-leave age weedless, in 6-7-leave age hoed once, from 6-7-leave age weedless, in 8-leave
age hoed once, from 8-leave age weedless.
Our results were assessed by chemical efficiency examination, maize length measurement, corncob-length and fertility examination,
Sorghum plant-number determination and yield weighing carried out in four periods. The data were evaluated by a one-factor analysis of
variance and a two-factor linear regression analysis.

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Comparison of growth parameters of 40 varieties/clones short rotation coppice willow (Salix)
Published November 20, 2011
99-104

The plantation of willow varieties was established in 2009. The 40 different varieties and clones of Salix were planted at a research field in Kolíňany (Nitra district). The paper evaluates results from the first growing season in 2009. The survival rate of planted cuttings ranged from 55.56 % to 100.00 % after the first year. The lowest surv...ival rate was reached by Terra Nova variety. The stem numbers per plant ranged from 1.17 ±0.37 to 2.53 ±0.98. The average height of one-year old stem varied from 65.82 ±36.60 cm to 225.58 ±68.61 cm. The average stem diameter ranged from 6.90 ±2.63 mm to 14.34 ±3.39 mm. There were statistically very significant differences in parameters of stem height stem diameter and stem numbers per plant among studied varieties/clones. The statistic method used was analysis of variance ANOVA. The varieties were then divided into 6 groups according to their similarity in observed parameters after the first growing season by cluster analysis. The best results were reached by varieties/clones classified in the second group. The survival rate, stem diameter and stem height values of these varieties/clones were above average. 

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Analysis of show-jumping results with different measure variables
Published November 24, 2008
77-81

The aim of this paper is to estimate heritabilities and to  compare different fitted models for Hungarian Sporthorse showjumping results. Our analysis is based on the show-jumping results between 1996 and 2004. The repeatability animal model for the evaluation of the test results included the fixed effects of gender, breeder, rider, age, y...ear of competition, type of competition, height of fence and number of starters. Variance and covariance components were estimated with VCE-5 software package. Fitting of the models were evaluated with log-likelihood values and Akaike’s information criterion (AIC). Heritability was low in all cases.
The lowest goodness-of-fit model was height of fence-error score and the best-fitting genetic model based on AIC was model using cotangent transformation.

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Measuring projectmanagement efficiency by Data Envelopment Analysis
Published February 17, 2015
121-124

I suppose that there is a relation between the success of EU-funded projects and the effectiveness of project management teams which implement them. To examine the accuracy of the assumption and the nature of the relationship I needed a measurement method that was suitable for measuring the effectiveness of project management teams implementing... EU funded projects in a given construction. Since Data Envelopment Analysis (DEA) has already been used to measure the efficiency of decision making units in other areas, it seems suitable for measuring project management effectiveness and indirectly measuring project efficiency.

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Analysis of the Station Test Results of the Hungarian Large White and Hungarian Landrace Populations Applying Survival Analysis
Published December 10, 2002
37-40

Authors analysed the days of fattening in relation to the station test for Hungarian Large White and Hungarian Landrace pig populations using, survival analysis. Survival and hazard functions were calculated in both groups separately for castrates and females. The log-rank test was applied to determine the significance of the differences across... the groups. Authors established that within the breeds the functions of the castrates and females were significantly different, namely the castrates reached final weight sooner or, in cases where final weight was not reached by a certain period, castrates reached this weight during the next time unit with a higher probability than the females.

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Preliminary results of the phylogenetic analysis of European hare (Lepus europaeus)
Published September 18, 2014
99-104

...5); font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">Brown hare (Lepus europaeus) is one of the most wide spread mammal in Europe. Its genetic structure is affected not only by last glacial, even by human activities (hunting, agricultural activities), isolation of such areas or competing for food resources. According to literature datas brown hare populations has different genetic variants in Europe, however its evolution, phylogenetics has not studied well.

The main goal of this work was to know genetic structure of some brown hare. Mitochondrial DNA analysis was performed in two regions (D-loop, 513 bp and cytochrome-b, 1183 bp). Genetic distance values and Network analysis were calculated. NCBI Genbank was used for further sequences. Our results showed that Italian samples differed from the Genbank samples. We found two main clades: 1: Greece without islands; Bulgaria, Italy and Central-Europe; 2: East-Macedonia,Greece with islands, Cyprus and North Israel.

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Analysis of the Relation Between the Relief and the Surface Water Network
Published May 11, 2003
90-93

The Bihar plain situated in the Great Hungarian Plain has altitudinal values between 87 and 108 meters above Baltic level and these low average values decreases from East to West. We can find on this place a surface water network with a high density; the most of them was created for diversion of inland water.
The GIS is the best practice for... modelling and simulating the relief and the water network. Towards the creation of the TIN model and relief- analysis we need the digital elevation model as well as the digital water network dataset for the whole territory. The source of the data was topographic maps on high scale level (1:10.000).

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Economic impacts of applying EU animal protection regulations in hog breeding farms
Published May 27, 2001
76-80

Hungary’s intention to join the EU makes it necessary to adopt, introduce and use the EU system of law. In Hungary, the legal control of animal welfare has improved (XXVIIIth law in 1998); however, most of our pig farms do not meet the EU animal welfare law requirements for some reason. We examined 9 pig farms in Hajdú-Bihar, Borsod-Abaúj-Z...emplén and Heves counties. We chose those farms which use the combined breeding
technology most frequently used in Hungary. The most important part of the welfare directive is the definition of the minimum space per animal. We analysed the data in comparison with EU laws. On the basis of the analysis, it can be said that there is a narrow cross-section: the breeding of piglets. During the cost analysis, we analysed cost and highlighted the permanent cost. We studied how these costs would change if EU animal welfare laws were observed. We also examined the specific data per 1 sow and per 1 kilogram of slaughter pig. We compared the present data (1999) with those we get if EU animal welfare laws concerning minimal space per pig were now followed. It can be stated that after decreasing the sow live-stock in accordance with EU directives, the permanent cost would increase by 17,7% per sow. If the required space per sow were provided, the total cost per sow would increase by 1,9% from 421,1 thousand forints to 429 thousand forints, on average. This would mean a decrease of 7,9
thousand forints profit per sow. As with the decrease of the number of sows, the number of slaughter pigs also decreases. Total cost per 1 kg of slaughter pig would increase from 214,7 forints to 218,2 on average. 

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Examination of feral pigeon populations at animal breeding farms
Published July 16, 2007
52-56

In the course of our examination, we assessed biometric data that determine gender, we evaluated sexual activity, measured the nourishment and necropsies of two feral pigeon populations feeding and nesting at animal breeding farms. The changes in the body weight of the different genders were significant on both farms (p<0.05).
The body we...ight and the crop volume of the birds were not significantly different at the examined farms.
On both farms, the elemental food source of the birds was the fodder and corn kernels given to cattle, and was supplemented by that of the pigeons living at the Debrecen farm with food from surrounding farms and with other seeds (pea, millet, rye).
By the examination of the genitals, the birds collected from the Nyírbátor farm showed sexual activity from the beginning of spring, and in the summertime decreasing activity is characteristic, while the pigeons from the Debrecen farm are only active from the summer months. In the course of the examinations in the Veterinary Institute of Debrecen, the birds proved to be free of parasites and the results of the Newcastle disease analysis were negative as well. The bacteriologic analyses showed a different proportion of E.coli, Pasteurella multicoda, haemolysing Staphylococcus bacteria at the two cattle farms. During the examinations for the statement of Salmonellas, this causative agent was stated only in case of birds that spend nights and nested in the town, which allude to human origin. We demonstrated Eimeria oocysts during the parasitological examination of the fecal samples in 5 cases at the Debrecen, and in 1 case at the Nyírbátor farm.

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Examination of the chlorophyll content of maize hybrids of different maturity groups at different N fertiliser doses
Published February 10, 2013
159-162

...5); font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">Nitrogen fertilisation is a critical point of maize production. Five hybrids of different maturity dates were examined in a field experiment, three treatments (different application dates) and three basic fertiliser doses (0, 60, 120 kg ha-1 N) were used. At the 6-leaf-stage of maize, each fertilisation level of the 2nd and 3rd treatment was given 30 kg N ha-1 fertiliser active ingredient in addition to the basic fertiliser doses with the exception of the control plots and further 30 kg N ha-1 fertiliser was applied at the 12-leaf-stage. The final fertiliser doses were 0, 90 and 150 kg N ha-1 in the second treatment and 0, 120 and 180 kg N ha-1 in the 3rd treatment. The whole amount of the basic fertiliser (ammonium nitrate) was applied in the spring, one month before sowing.

The relative chlorophyll content of the maize leaves was measured, with a Minolta SPAD-502 measurement device. The measurements were carried out at the 6-leaf growth stage (V6) of maize on the youngest fully developed leaf of the 6th, 7th and 8th plants from the second row of each plot.

There were significant differences in the SPAD-readings measured at the V6 phenophase of maize between the hybrids (p<0.001) and the fertiliser treatments (p<0.05). The regression analysis did not show any correlation between the SPAD-values and fertilisation.

The highest significant SPAD-reading and yield were obtained by applying 120 kg ha-1 N. As a result of the regression analysis performed on yield, it can be concluded that the correlation between fertilisation and yield in the 1st and 2nd treatment was moderately close (r=0.439, r=0.480) and it was close in the 3rd treatment (r=0.513). The correlation between the SPAD-readings and yield was the closes in the 2nd treatment (r=0.639), while the SPAD-value had a 40.9% influence on yield (p<0.001).

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ROC analízis alkalmazása
Published March 27, 2002
4-7

According to publishings in foreign scientific journals, ROC (Receiver Operating Characteristic) analysis is a widely used method for analysing the diagnostic utility of clinical laboratory tests. In this paper, we explain the basic principles of ROC analysis and produce ROC curves, as well as demonstrate some ROC curves, which represent the re...sults of diagnostic tests.

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SNP analysis of ITS1-5.8S-ITS2 rDNA loci in modern and ancient melons (Cucumis melo)
Published November 15, 2007
120-124

ITS (internal tanscribed spacer) profiles of the aDNA (ancient DNA) of seed remains extracted from an extinct sample recovered from the 15th century (Budapest, Hungary) were compared to 31 modern melon cultivars and landraces. An aseptic incubation followed by ITS analysis was used to exclude the exogenously and endogenously contaminated (Asper...gillus) medieval seeds and to detect SNPs in ITS1-5.8S-ITS2 region of rDNA (ribosomal DNA). SNPs were observed at the 94–95 bp (GC to either RC, RS or AG) of ITS1; and at 414 bp (A-to-T substitution), 470 bp (T to Y or C), 610 bp (A to R or G) of ITS2. The results facilitate the final aim of molecular and morphological reconstructions of ancient melon tpyes.

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The effect of the plant density for the yield of the maize hybrids
Published May 23, 2006
50-61

In order to enchance the yield stability of maize, the effect of plant density on yields was studied on a typical meadow soil in Hajdúböszörmény between 2002-2004. In the plant density experiment, we used the method of Béla Győrffy. The plant densities applied therefore 20 to 100 thousand plants/ha by ten thousand scale. The application o...f fertilizer rates for the maize hibrids in every year were N: 110 P: 90 K: 120 kg/ha. We used a manual soiling-gun in the experiment. In every year we used plant protection techniques against monocotyledonous and dicotyledonous weeds. The harvest was done by hand. The facts were read by variancie analysis and linear regression analysis. The moisture and the temperatures were extreme in 2002, 2003, 2004. We have to mention defficiery of moisture in 2003 which is shown that the hot days number increased. After evaluating our findings we can conclude that most hybrids showed a significant correlation between increased plant density and the volume of yields. On the basis of the experiments we divided the hybrids into four groups: the first group included the hybrids suitable for increased plant density with a wide range of optimal density values; the second group included hybrids, which did not require high plant density, were capable of good individual performance and tended to grow several ears; the third group included flexible corn types, which grew longer ears in favourable years, thus yielded more; and the fourth group included the hybrids, which were sensitive to increased plant density and which showed a narrow range of optimal density values. Finally, plant density determines the yield; we have to consider optimal plant density intervals as well as optimal plant density, and we also have to place a high emphasis on the use of hybrid-specific technologies.

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Effect of the fertilization on some quality parameters of winter wheat
Published December 15, 2010
105-110

We studied the different mineral fertilizer rates effect on the baking quality of five different winter wheat genotypes (GK Öthalom, Lupus, KG Széphalom, GK Békés, Mv Mazurka) on chernozom soil in 2008.
The bigger fertilizer doses increased the wet gluten content, gluten elasticity and the protein content. The high doses of fertilization... has got a moderate effect on the valorigaph value, water absorption, and falling number. The optimum level of the fertilizer doses were the N90-120+PK.
The Pearson’s correlation analysis proved strong relationships between the fertilization and gluten content, the quality of the gluten, a valorigraph value, and the protein content. The analysis verified a strong correlation between genotype and falling number, and the protein content.
The variety Mv Mazurka has got the best baking quality parameters.

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The response of sunflower hybrids to different plant densities on a chernozem soil
Published July 31, 2012
123-128

In our experiment the reaction of six sunflower hybrids of different genotypes (NK Oktava, ES Biba, ES Diagora, ES Ballistic, EGH 8925, PR 64 H 42) towards plant density has been investigated by different fungicide treatments in the crop-year of 2011 on a chernozem soil. 
In the crop-year of 2011 sunflower populations were infected by a... significant Diaporthe helianthi disease. The extent of this infection was significantly enhanced by the increment of plant density. However, regarding the average of the hybrids and plant densities the two times executed fungicide treatment has decreased the infection rate by 22%. The most susceptible hybrid was the ES Biba. Contrarily, the hybrid ECH8925 proved to be the most resistant hybrid towards this
disease according to our results. According to the results of the Pearson’s correlation analysis it has been revealed that stalk breakage and Diaporthe infection stand in a very close (r=0.782**) and middle close (r=0.523**) correlation resp. with plant density. The relationship between fungucude treatments and stalk breakage, just as Diaporthe infection showed to be middle and close respectively. Our results demonstrate the role of stalk and plate diseases (among them Diaporthe) in causing stalk breakage, for we have found a close positive correlation between stalk breakage and Diaporthe infection (r=0.624**) in our analysis.
From the aspect of yield amount the optimal plant density varied between 45 000 and 55 000 plants per hectare. Fungucude treatments enabled not only the use of higher plants densities, but they had a yield increasing effect as well. In the crop-year of 2011 the highest yield (4 559 kg ha-1) on a chernozem soil has been measured in case of the hybrid ECH8925.

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Analysis of the genetic origin of European hare (Lepus europaeus) (technical literature review)
Published March 20, 2014
49-54

Fossil datas showed that the lagomorphs appeared in Asia during the later Eocene and leporids separated from ochotonids during the Oligocen or Upper Eocene. During the Pleistocene, climatic changes induced major shifts in species distributions, forcing them to refugia.
In Europe, the continuous oscillations led to the production of greater s...ubspecific and specific diversity in the southern peninsulas (Iberia, Italy, Balkan) which were the main refugial areas for other species as well. Evolution, phylogeny and population genetics of the Lagomorpha species are still poorly known and the taxonomic distinction is still unclear for some species. Conservation genetics is the discipline which use genetic techniques and analysis methods to preserve species and dynamics. Usually it is working together with population genetics what role is to investigate the origin, the maintenance, the organization and the causes of genetic variation between natural populations. In the present study I reviewed the results of origin and phylogenetic studies of Brown hare populations from the last decades.

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Phylogenetic studies of soybean pathogen Phoma species by Bayesian analysis
Published October 20, 2009
53-61

We carried out phylogenetic study analyzing sequences of genetic markers in the taxonomy of Phoma and Phoma-like fungi. Different species of Phoma and Phoma-like fungi occurring on soybean (Phoma pinodella, Phoma sojicola, Phyllosticta sojicola, Phoma exigua var. exigua) are difficult to identy because of their high morphological and symptomati...c similarities.
Twenty-two isolates of nine different Phoma species were obtained from reference culture collections. Seven of them were isolated from soybean, the others were collected from different hosts.
The Phoma isolates were firstly characterised by morphologically, and then we employed a part of the gene responsible for the synthesis of translation elongation factor 1 subunit alpha protein (tef1), ITS region, as well as β-tubulin partial sequences as potential genetic markers to infer
phylogenetic relationships among different Phoma species..Finally, their ITS and tef1 sequences were sequenced and analysed by Bayesian approaches.
According to phylogenetic trees inferred by Bayesian analysis of tef1, ITS and β-tubulin sequences, different Phoma species can be separated proving that these phylogenetic markers are well suited for phylogenetic studies of Phoma species. However, the phylogenetic tree does not support the traditional Phoma sections based on morphological characterization.
Bayesian analyses of the three sequences confirmed that the Phyllosticta sojicola species is clustered with the Phoma exigua var. exigua group and the Phoma sojicola is grouped with Phoma pinodella group. The molecular data provide evidence for reclassification of formerly mentioned soybean pathogens.

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Participation of Women in the United States Congress: 1917-2011
Published May 2, 2012
63-66

The last decades have carried changes in the legal and social position of women bearing enfranchisement, a new approach to women’s education, and their increased participation in the job market. This article outlines the historical participation of women on the political scene of the United States between the years of 1917-2011 including an a...nalysis of the situation in the individual states. Furthermore, it analyses what types of positions have been held by women in the American Government Administration including the most prestigious ones of the Speaker and the Secretary of State. It also introduces Hilary Rodham Clinton, the first woman ever to run in the presidential elections 2008. This analysis reveals that women are still underrepresented in the federal-level positions which makes it difficult for them to influence the quality of the lawmaking and results in a difficulty to promote such decisions that are important for the women themselves.

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Decreasing Energy and Water Use in the Meat Industry
Published March 4, 2005
24-28

The technology supervisions are needed from time to time in order to involve the new research results, experience, new technologies and equipments organising principles into the production and to make it cheaper and with less expenditure to increase the profitability and competitiveness. In the course of our investigation we aimed the analysis ...of the traditional technologies and improving of it. In this article we detail the heat treatment curing process. We applied the principles of experimental design for the determination the main influencing parameters in the processes. Then we made simulations and modelling in seeking for the environmentally better technology programs. We developed a method for measuring the temperature development of products with small diameter using the similarity theory in unit operation. In the course of the analysis of the heat treatment processes we could state that the heat treatment time can be reduced significantly by decreasing the size of the product and choosing the right ratios among the surface heat transfer intensity, ambient temperature and involving the lethality obtained during the cooling phase. The total sparing were about 10-20%. We solved the problem associated with the sensor placement error using a plastic material (metamid). We establish a curve between the real product temperature and plastic rod temperature by which the monitoring of the process became more accurate. We determine the size modification for different product sizes. In case of curing we observed very similar phenomena. For the determination of the diffusion coefficient we adopted the Ball-method not using in this field till today. We could reduce the excess saltiness and loss of NaCl with about 5%.

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History of origin and development of replacement of plants crop rotations is in world agriculture
Published May 6, 2013
53-56

...5); font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">In practice of world agriculture a long ago the known problem of decline of harvests of agricultural cultures at their permanent growing, scientific explanation of this phenomenon became possible only with appearance of natural sciences. At first the declines of harvests bound to the toxic action of root excretions cultures on her repeated sowing, with development of humus theory of feed of plants of diminishing of harvests at the permanent sowing began to explain impoverishment of soil on a humus.

During a few centuries the known farmers development the looks in relation to forming of scientific bases of construction of replacement of plants crop rotations in the world systems of agriculture, set history of their development and improvement. The analysis of influence of possibility of optimal satiation of replacement of plants crop rotations is conducted by agricultural cultures on the level of fertility of soil, water and nourishing modes and their productivity. For the terms of the insufficient moistening a positive action is marked black pair on the improvement of the water mode of soil in crop rotations.

In historiography the problem of introduction and mastering of replacement of plants crop rotations for the decision of scientific and practical tasks of agricultural production is represented in many-sided aspects, worked out and the recommended replacement of plants crop rotations that are base on zonal principle of development of world agriculture that passed the protracted term of test and counted on various specialization of economies. But for today development of scientific and technical progress requires intensification of agricultural production with the use of intensive crop rotations and growing of high-performance cultures.

Hereupon there was a necessity of realization of analysis of the systems of historical value of scientifically-practical knowledge about development and improvement of replacement of plants crop rotations, as it gives an opportunity to work out to recommending a production with the use of the most effective elements of the past on modern agrarian business and allows to forecast them on the future.

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Managing risk using real options in company’s valuation
Published April 8, 2014
125-132

The valuation of company is very important because provides information about the current value/situation of company, and through this, provide the opportunity of choosing the best company’s growth alternatives. The future strategic decisions are characterized by lack of knowledge, information, so all measures of company’s growth are closel...y linked with uncertainty and risk. The company’s valuation process is also related with uncertainty and risk. The risk may result both from the assessed assets and the technique used. In literature, we could find three approaches for risk management: capital budgeting based method, methods based on portfolio analysis and real options approach of risk management. Among them, the real options based methods is the most revolutionary approach for risk management. The advantages of the method, consists in the fact, that the process of establishing strategic decisions integrates the possibility of reversibility, delay and rejections, which isn’t it possible at two previous methods. The method also takes into account the total risk of company, so both the company-specific and systematic risk. In this study, I have used one of the best-known real option based method, the Black-Scholes model, for determining the option’s value. Determination of option value is based on the data of enterprise, which was tested Monte Carlo simulation. One of the basic assumptions of the Black-Scholes model is that the value of option is influenced by several factors. The sensitivity of option’s value could be carried out with so-called “Greeks”.. In the study the sensitivity analysis, was carried out with indicators Delta (Δ), Gamma (Γ) and Vega (ν). The real options based risk management determinations were performed in the R-statistics software system, and the used modules are 'fPortofio' and 'mc2d'. By using of real options method, I have calculated the average value of company capital equal with 38.79 million. By using simulation was carried out 1000 runs. The results of this show a relatively low standard deviation, small interquartile range and normal distribution. In the calculation of indicator Delta, could be concluded the value of company moves in 0.831 proportion to the price of options, the standard deviations of index is low, so the real option based method could be used with success in company’s value estimation. The Gamma index shows the enterprise value is sensitive just for large changes. The result of Vega reflects the value of option, so the company’s value volatility, which is small in this case, but this means a volatility of value. In summary, we can conclude that the call options pricing model, well suited for the determination of company’s value.

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Effects of production factors on the yield and yield component of winter wheat
Published May 27, 2001
26-31

The effect of major production factors (forecrop, fertilisation, irrigation, soil cultivation and soil preparation) on the yield components and yield of winter wheat were studied in a long-term  experiment set up at the Látókép Experimental Nursery of the Agricultural Sciences Centre of the University of Debrecen. The results of regress...ion analysis led to the following conclusions:
• In our experiments in 2000, after using maize as a forecrop –based on the results of analysis of regression – fertilisation determined the yield.
• After using pea as a forecrop, a N50 P35 K40 kg/ha fertiliser rate led to an economical increase in the yield of winter wheat.
• None of the determinative yield components varied significantly for winter wheat produced after using pea as a forecrop.
• There is a closed, significant correlation between plant height, spike length, plant and spike mass, the number of spikelets and grains per spike after using maize as forecrop. The thousand grain mass is different from the other yield components, because it is not part of the relation system of
those yield components.
• The increased yield of winter wheat after maize has been used as a forecrop is due to the positive change in grain number per spike yield component.

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