Articles

• Agrikultúra és kultúra (Egység és sokféleség a magyar műveltségben) : A 2002. évi Mezőgazdasági Könyvhónap megnyitóján elhangzott előadás

  3

  László Imre

  Views:

  86

  Ismeretes, hogy földművelés és mindenféle művelés műveltség még a szó etimológiáját tekintve is azonos eredetű. Tehát kezdetben volt az agrikultúra, s ebből származik minden másfajta kultúra. Azaz: az ember előbb a földet tanulta meg művelni, aztán ennek mintájára önmagát és embertársait kezdte formálni, fejleszteni, tökéletesíteni. A vad, sőt barbár, olykor veszélyekkel teli növény- és állatvilágot az ember életadóvá alakította, önnön megmentőjévé tette. Ennek analógiájára a beszéd és írás módjait, jeleket és tapasztalatokat arra használt fel, hogy tudást és szépséget, tudományt és művészetet, azaz műveltséget örökítsen tovább.

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  138

• ROC analízis alkalmazása

  4-7

  Mária Fazekasné Kis

  Views:

  156

  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 results of diagnostic tests.

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  477

• A szervetlen-C és a szerves-C mennyiségének változása egy homoktalajban, meszezés hatására

  8-10

  Péter Tamás Nagy

  Tibor Filep

  Sándorné Kincses

  Views:

  145

  The effect of liming on different organic and inorganic carbon forms in soil was studied in a pot experiment on acidic sandy soil (pH(H2O)=4.38; pH(KCl)=3.42). We used three kinds of liming doses (which were signed M1, M2, M3,). M1 was half of the M2 dose; M2 was the calculated lime dose and M3 was one and the half dose of M2. Lime (CaCO3) was mixed into the soil in powdery form. In addition to liming treatments, a uniform N, P and K treatment (1-1-1g N, P2O5 and K2O per pot) was given. Water supply was set up to 75% field water capacity of soil. Pots were watered daily. During the vegetation period soil and plant (oats; Avena sativa L.) samples were taken from each treatment three times (after 6-10-15 weeks). We determined inorganic- and total-C of the soil by Vario EL element analyser (based on dry combustion method) and calculated the organic-C.
  The conclusions can be summarized as follows:
  – Liming treatments had a significant positive effect on the soil-pH and caused quantitative change of different carbon forms of soil.
  – Increasing tendency of liming doses caused more intensive changes in inorganic- and organic-C forms of soil.
  – A significant correlations was found between the soil pH and the inorganic-C fraction of soil.
  – A decreasing correlation was found between the vegetation period and the organic-C fraction.

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  127

• Nyelvi kompetencia-elvárások a multikulturális munkaerő piacon

  11-14

  Magdolna Feketéné Silye

  Views:

  138

  Proficiency in a foreign language, especially when combined with knowledge of and skills in another professional area, is highly desirable in the multicultural marketplace. Just as business and media have experienced global changes over the last few decades, so, too, has grown the acceptence of English around the world as the lingua franca for economic and scientific exchange. Second language speakers increasingly turn to English as a requirement of international communication. It is more than understandable that in many European companies, proficiency in English may even be a hiring criterion (Inman, 1983). The spread of English thus privileges certain groups of people and may harm others who have less opportunity to learn it.
  One can rightly conclude that we are in an age when communicative language skills in English are an indispensible component of literacy. Many claim that this may well entail significant changes in the social and individual values of nations and people.
  This paper investigates some of those underlying social and economic processes that have over the past few decades brought English language literacy into the focus of the attention of many researchers and educators. In the framework of the paper, certain issues of the conceptual impact that these changes have (or are presumed to have) on English language education are also discussed.

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  140

• A gombatermesztés szerepe az átalakuló magyar mezőgazdaságban

  15-22

  Gábor Horváth

  Views:

  99

  The structure of Hungarian agriculture should be changed before the EU accession. The new structure should fulfill EU requirements and also produce competitive products. Unconventional products (mushroom, fish, honey etc.) have a lot of advantages: they can be produced on small farms, their trade is mainly free of regulation and their markets are almost unlimited. This paper deals with one of these alternative agricultural enterprises, namely mushroom production. Hungarian mushroom production – in spite of difficulties – has witnessed remarkable expansion: it has increased its production by fourfold and its export by fivefold in less than ten years. The low level of wages gives Hungary significant advantage over its competitors. If we could ensure the appropriate infrastructure (technical advice, bank loans, etc.) the mushroom industry would become one of the most profitable sectors of Hungarian agriculture.

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  178

• Az NPK-trágyázás hatása a kukorica tápelemfelvételének dinamikájára, öntözött és nem öntözött viszonyok között

  23-27

  Sándorné Kincses

  Tibor Filep

  Jakab Loch

  Views:

  185

  The effect of NPK-fertilization on the dynamics of nutrient uptake of maize (Zea mays L., cv. Clarica) was examined on chernozem soil under irrigated and non-irrigated conditions in a field experiment.
  The following results were made:
  • the element concentrations in the plant decreased over time,
  • there is no difference between the dynamics of nutrients on irrigated and non-irrigated sites because rainfall was satisfactory for plants in vegetation period,
  • the N doses not only significantly increase the nitrogen content in maize, but also have a noticable effect on Ca and Mg concentrations,
  • because of the acidifying effect of N-fertilizers, increasing the amount of N-fertilizer increased the Mn, Zn, Cu content of the plants,
  • the P doses have a significant effect on the maize P and N content and the Zn concentration of the plant via P-Zn antagonism in the soil,
  • as the high K doses treatments alter the ion ratios in the soil, the Ca, Mg content of the plant decreased.

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  176

• A tárolási feltételek hatása a kukorica Fusarium fertőzöttségére és toxin szennyezettségére

  28-32

  Edina Veres

  Mária Borbély

  Zoltán Győri

  János Kátai

  Views:

  311

  Corn samples harvested in 1997, 1998 and 1999 from different soil types were stored at different conditions (temperature, moisture content, state of kernels) for six months. The Fusarium contamination was examined by plate dilution method and the amount of mycotoxins (F-2, T-2, HT-2, DON, DAS) were determined applying HPLC method immediately after harvesting and in the third and sixth month of storage. The aim of our study was to find correlation between the ecological factors, storage conditions and the examined parameters mentioned above, as well as to prove them statistically. According to the examinations carried out after harvesting we could state that the soil type had no effect on the parameters. Analysing the effect of the years we found considerable differences. The Fusarium infection of corn samples in 1998, while the toxin contamination in 1999 was the highest. The results of storage experiment show that year (number of microscopic fungi, F-2, T-2, HT-2, DAS and total toxin content) and moisture content of kernels (F-2, T-2, and total toxin content) have a significant effect on the examined parameters. We could prove the effect of temperature on the T-2 content (samples with natural moisture content) and DON content (samples with 14% moisture content). Higher values were found at higher temperature storage. The ratio of damaged kernels influenced the DON concentration in the non- wetted samples and the number of microscopic fungi in the wetted samples.

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  270

• Az évszak és az azonos évszakban történt ismételt mintavételek hatása holstein tenyészbikák ejakulátumának minőségi- és mennyiségi jellemzőire

  33-37

  János Tőzsér

  Miklós Mézes

  József Várszegi

  Ferenc Szász

  Views:

  110

  This study was carried out at the Hungarian National Artificial Insemination Centre in order to evaluate the seasonal effects on the quantitative and qualitative parameters of sperm production using sperm analyser equipment. The volume of ejaculate (VE), percentage of living sperm (PLS), spermatozoa concentration (SC), motility score (MC), percentage of motile spermatozoa (PMS), speed of movement of sperm cells (SMS) and the percentage of sperm cells moving straightforward (PSMS) were collected and observed in three seasons (summer, autumn, winter) in Holstein-Friesian breeding bulls (n = 15). The sperm collection was done for three successive weeks in every season on the same day (summer: n = 41, autumn: n=39, winter: n = 42, altogether: n = 122). The same sperm samples were measured by sperm analyser equipment (HTM version 7.0, Danvers) for PMS, SMS and PSMS. The seasonal and the number of sperm collection effects were confirmed on semen characteristics by multiple analysis of variance (two ways MANOVA, Type III) using the program package of STATISTICA 4.5. The average values of VE were similar in the three seasons (summer: from 4.42 to 6.28 cm3, autumn: from 4.08 to 6.86 cm3, winter: from 5.43 to 5.71 cm3). The average values of the MC were similar in each of the three seasons (summer: from 3.66-4.00 M; autumn: from 3.66-3.77 M; winter: from 3.86-4.07 M). The summary of all effects for season (P<0.001), repeated sperm collections in the same season (P<0.05) and interaction of two traits (P<0.01) were established on the measured characteristics. The special effects (P<0.05) of a given season were calculated, excepting the VE and MC, on all of the measured characteristics. The special effect (P<0.01) of the repeated sperm collections in the same season was verified in only one case (SMS). It is not surprised at the interaction was established on the VE (P<0.001), PMS (P<0.05), and SMS (P<10.0). The results of present study suggest that seasonal effect on sperm quality of breeding bulls cannot be eliminated even at standard feeding and keeping conditions. Considering our results, we can recommend that the average values of three successive weeks in every season be used, to take advantage of seasonal effect on the quantitative and qualitative parameters of sperm production.

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  162

• Búzalisztek minőségének becslése tészta nyújtás-szakítás alapján állományvizsgáló műszerrel

  38-44

  Katalin Horváthné Almássy

  Péterné Ács

  Ottilia Baráné Herczegh

  Anita Deák

  Views:

  95

  Literature experience was utilised to develop a method for the extensograph analog testing of paste with a QTS25 Texture Analyser. 54 wheat flour samples from the same variety from variety-preservation experiments at the Szeged were tested with this method. A study was made to establish whether the method is suitable for the estimation of results derived by traditional classification (trial baking, farinograph and gluten tests).
  A close and significant correlation was found between the hardness and area data measured with a QTS25 micro-extensograph, the farinograph values and the gluten spreading data, and also between the stretching index (BC/AC) and the water uptake capacity. These correlations correspond well with the findings from a previous experimental series on industrial flour samples. A close and significant correlation was likewise observed between the grain hardness established by the MININFRA method and all the QTS25 micro-extensograph data. In contrast with earlier QTS25 data, however a close correlation was not found between the QTS25 data and the loaf characteristics.
  With the use of micro-extensograph data, the estimation of the baking industry value has been improved through stepwise variable selection, with the inclusion of several variables. The estimation of loaf volume could also be solved by means of stepwise variable selection with the inclusion of QTS25 and MININFRA data.

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  124

• Búzaminták fungicid szermaradvány ellenőrzése és gombafertőzöttségének kimutatása

  45-51

  József Soós

  László Fehér

  Krisztina Rigó

  Lajos Tanács

  Views:

  92

  To protect crops with chemicals against different microorganisms are very important because residues of toxins could pollute infected grains. This could have the meaning of serious danger to the human and animal health. Similarly important is knowledge of details about presence or absence of any practically applied protective compounds. Experimental studies were performed on fungicide treated cereals of the Cereal Research Non-Profit Company, Szeged. Chromatographic methods were used (GC and some GC-MS) to find low level fungicide residues, microwave-assisted isolation of ergosterol was followed by HPLC to detect possible fungal infections and a more detailed microbiological analysis completed the work. Concerning the dry year 2000, no fungicides were found in the samples (by November), the ergosterol level was found to be less than 8 ppm, meaning good quality, coupled with an extremely low level of fungal infections. This was confirmed by direct microbiological testing. In comparison with the microbiological results from 1999, a negative difference can be recognized, most probably due to the rainy weather throughout the year.

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  130

• Önitatók konstrukciós és hidromechanikai vizsgálata

  52-57

  Sándor Dávidházy

  Views:

  115

  Our research aimed to examine Hungarian automatic drinking system constructions and hydromechanics under laboratory conditions and in operation with special emphasison the small volume, valve types.
  Considering that no Hungarian standard of automatic drinking system examination and qualification exists, on the basis of technical literature, the new examination method of automatic drinking systems has been elaborated.
  For laboratory measurements, a universal measuring bench was assembled which is applicable to the hydromechanic testing of all automatic drinking systems (cattle, sheep, pig).
  Summary of the laboratory measurements:
  Upon comparison of the flow capacity of the valves, in the case of same opening values (h/dn), the rubber spring valve of SZI type automatic fountain has the highest flow capacity, although in the case of 100 kPa pressure even this type has only 15-16 l/min value which hardly surpasses the lower limit of the desired 15-25 l/min range.
  The loss coefficients of the valves, on investigating in the range 100-200 kPa, showed the lowest value (2,2-5,8) with the steel spring self drinking device.
  Summary of the operational investigations:
  In the long term operational investigations, the rubber stripped valve and the rubber spring automatic fountains had the most favourable operational reliability values: K4=0,98 and K4=0,94, respectively.
  From the aspect of animal operation of the valves, all the Hungarian types are frontal operated, thus such system automatic valve drinking devices can be used only in long and moderately long stands, directed toward the animal.
  On the basis of hydromechanical and construction examinations of the Hungarian tied cattle production technology the construction modification of the rubber spring valve of SZI type automatic drinking fountain, which is the most frequantly used in this country, was carried out. Due to design modifications the valve parameters improved significantly.
  The goals of the accomplished valve modification were
  ζ'sz – loss coefficient to be reduced
  q – flow capacity to be increased

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  124

• A földhasználat alakulása az ezredfordulón - egy felmérés eredményei

  58-66

  László Posta

  Views:

  100

  There were no significant changes in land ownership and use in 2000, compared to the period following the compensation process. Land is mainly owned by people who do not want to use their property, so they generally turn to renting it out to others. Although farming on rented land is performed under various conditions, farms try to rent the lands of better quality. In general, examined farms would like to increase their size by tenancy or land purchase. Buying land is a good investment, considering the price increase in the future, but because of the lack of capital, tenancy remains the main form of territory increase.
  Farms which rent land are in connection with a lot of owners, the land within their use is frittered away, it is in a lot of parts. Most rental contracts are written, but the ratio of oral contracts is still quite high. To reduce this ratio is one future aim. One more characteristic of the rental contracts is the dominance of a medium length period – which is acceptable for both the owner and user, but the ratio of short time contracts is still high. Land rent, on average for the examined farms, is quite balanced, it is on the level of about 16.000 HUF/hectare.
  The land users mainly pay the same land rent to the owners, but in some cases, there are exceptions. Generally, land rent is a fix cost, but sometimes this cost depends on the level of the yield or the change of product price. Land rent, on average, is 16% within the production costs on the examined farms, which try to choose better and larger lands for rent. Sometimes, farmers can pay higher land rent for the unit of better land, but this is not a general tendency. It is mainly true that they pay the same land rent for the unit, regardless of land quality. Land owners can not interfere in the use of their land within the rental period, and also is a main characteristic of contracts that important particulars are not spelled out sufficiently by the partners. It follows that their content has to be improved in the future.

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  126

• Az észak-alföldi mezőgazdasági vállalkozások pénzügyi helyzetének elemzése 1997-1999-es adatok alapján

  72-76

  Attila Rózsa

  Views:

  81

  The income of agricultural enterprises varies greatly according to the type of agricultural production.
  We analysed the financial situation of some agricultural companies from Szabolcs-Szatmár-Bereg and Hajdú-Bihar counties. We got the data from the Department of Justice from reports made between 1997-1999. The available data was classified and averaged by counties.
  Although the management of the examined enterprises ensured profit, closer analyses of their cash flows reveal that, at least in some cases, expenses were not always coverable, despite income. Both counties, major emphasis was on improvement and support investments. It is highly probable that these investments will later result in an increasing income level and profit.
  Altogether we cannot say which county enjoys a better situation, and what the reasons for the differences are. Further data collection and analyses are needed to find the answers.

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  143

• A vezetői elégedettség vizsgálata egy mezőgazdasági szervezetben

  77-81

  Ágnes Barta

  Views:

  96

  Human resource managers are able to plan and organise activities which influence their own and other peoples’ performance, and also make necessary corrections on the basis of those performances. Managerial skills, experience, type of abilities and competencies each play a definitive role in organisational decisions. On the other hand, the second determinative factor of managerial performance is the organisation in witch they work.
  The goal of my survey was to analyse contentment of different level managers at Szerencsi Agricultural Rt.

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  151

• Az elmúlt tíz év változásainak vezetői értékelése különböző szervezeti formában működő vállalatoknál

  82-86

  Gábor Kerékjártó

  Views:

  123

  revolutions and changes. Effects of these changes can be sensible at all parts of agricultural production. It results in new ownership and organisation structure. Agriculture has to suit to the new circumstances of changed firm-size and structure. These kinds of changes essentially define conditions of agricultural production in the future, and they have an affect on husbandry of enterprises.
  To be succeed in managing changes, we have to know the reasons of these alterations and nature of them. It is very important to get to know the advantages and disadvantages of the typical change-management methods and its typology. These methods are more elaborated and widespread at industrial enterprises. It is necessary to get to know the nature, characteristics and reasons of changes, and we should work out ways agricultural companies, taking notice of their speciality.
  The methods and means of examinations
  We aimed to point out what kind of changing processions were typified the activity of agricultural ventures. What are the speciality, strains, the arousing and obstructive factors of nowadays changes. We made questionnaire and sent them to numerous enterprises.
  Most of the answers show that leaders are „floating with flow” and most part of their power is used to fight back actually challenges. Generally consciousness is missing, so they are not govern the events still more they are passive objects of occurrence.
  Naturally, the given answers show, that the most important changes of past are changing of markets, importance of quality production and changes in the structure of enterprises. And – especially at companies, which deal with plant growing –, modifying of structure because of compensation.

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  136