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• Impact of weather on the spring crops yield in Croatia with emphasis on climatic change and the 2014 growing season

  41-46

  Vlado Kovacevic

  Jasna Sostaric

  Views:

  198

  Main field crops in Croatia are maize, soybean, sunflower and sugar beet. By these crops are covered (status 2014) close to 50% (385 234 ha) of utilized arable land. Global warming, have often adverse influence on field crop yields. Aim of this study was testing precipitation and temperature regimes on spring crops yield in Croatia in 15-year period (1999–2013) and elaboration of the 2014 growing season with aspect of climatic change.

  Four growing seasons (2000, 2003, 2007 and 2012) were less favorable for maize because annual yield was bellow 5 t ha^-1 (average 4.38 t ha^-1), while in four more favorable years (2005, 2008, 2009 and 2010) annual yield was above 6.8 t ha^-1 (average 7.32 t ha^-1). Average precipitation and temperature for the April-September period in Osijek were 226 mm and 496 mm, 19.6 ^oC and 18.6 ^oC, for less and more favorable years, respectively. Yields of soybeans and sugar beet have mainly similar trend as maize yields in function of weather conditions, while sunflower is more susceptible to extremely moist growing seasons (for example, 2001 and 2005: 650 mm and 697 mm precipitation and very low yields in level 1.7 and 1.6 t ha^-1, respectively). On the other side, under drought conditions of 2003, 2007 and 2012, yields of sunflower were above average in range from 2.5 to 2.7 t ha^-1), while at same period yields of maize, soybean and sugar beet were drastically reduced.

  Average precipitation in the April-September period of 2014 for eight selected sites of Croatia was 756 mm or for 68% higher in comparison with the long-term average 1961–1990 with variation among the sites from 520 mm in Osijek to 910 mm in Varazdin. On the other side, average air-temperature in 2014 was 17.8 ^oC or for 0.7 ^oC higher with variations among the sites from 17.2 ^oC in Daruvar and Varazdin to 18.2 ^oC in Osijek and 18.3 ^oC in Gradiste. Under these favorable weather conditions, annual yields of maize (8.1 t ha^-1), soybeans (2.8 t ha^-1) , sunflower (2.9 t ha^-1) and sugar beet 63.6 t ha^-1) were considerable higher than usual.

• Organic soybean production in Hungary

  45-52

  Borbélyné Éva Hunyadi

  Dóra Drexler

  Judit Berényi Üveges

  Nóra Szigeti

  Péter Fejes Tóth

  Márta Ladányi

  Views:

  222

  Organic soy production, particularly for feedstuff in organic animal husbandry, is needed in Hungary and the EU regions. Soybean producing crop area in Hungary has increased in the last years, however, the agroecological potential would allow for a larger soybean production area. This study presents the soybean market in Hungary, and the role of soybeans in protein supply in food and feed, summarising the critical elements of organic soybean production from variety selection to marketing. During the field research, the effects of the agronomical environment on yield potential factors were examined. We aimed to determine how different row spacing and tillage systems affect organic soybean yields of different varieties, with particular attention to the dry region, and determine the specific methods and varieties of soybean that favour these areas. We found that the tillage (plough/grubber), the spacing (wide/narrow), and the variety effects were all significant on morphological variables. The most remarkable difference was seen in plant height and the number of pods per plant, while the number of nodes was also highly impacted by tillage treatment and variety. The nutrition variables were significantly different, mainly as an effect of tillage and spacing interaction with significantly different plant responses of varieties.

• Comparative study of different soybean genotypes in irrigation technology

  91-95

  Nikoletta Edit Nagy

  Péter Pepó

  Views:

  321

  In many places in Hungary, early maturity soybean can be successfully grown. The earlier maturity group of soy which ripened in 110–125 days in most crop areas in Hungary. However, to achieve excellent results, the selection of proper varieties is important too. Successful cultivation is largely dependent on the macro and microclimate of the production area, the nutrient supply of the soil and the cultivation technology. Soybean can be produced in places where the amount of precipitation is right, as the lack of water results in lower yields and deteriorated oil and protein concentrations. In the following study, 2 years (2016 and 2017) are compared to the yield, protein and oil content of the soybeans of the early maturation group in irrigated and non-irrigated treatments. Based on our experiment, it can be stated that, during the irrigation of soybean, oil and protein content and yields did not always change.

• Evolution of some components of agroecosystems productivity from Vinga Plain in water stress situations

  174-179

  Daniel Dicu

  Iacob Borza

  Dorin Tarau

  Views:

  80

  The researches are inscribed on line of substantiation of durable agricultural system, having main objective the prominence of
  quantitative and qualitative modifications made on agro-system level under the effect of no-tillage system for wheat, maize and soybeans.
  The experimental field is placed on a cambium chernozem, with a medium content of clay, dominant in the Prodagro West Arad agrocentre
  and representative for a large surface in the Banat-Crisana Plain.
  The passing to no-till system change the structure of technological elements, through less soil works, so the impact on agro-system is
  different comparing with conventional tillage, first less the intervention pressure on agro-system ant secondly appears new interactions, new
  equilibriums and disequilibriums.
  Considering the evolution of soil humidity, the observations made monthly (by taking soil samples and laboratory determinations) for
  the three cultures showed that in the no-till system, there are more uniform values in the soil profile, and in the variants where the deep work
  of soil was made it could be observed a low increase of the water volume in the soil.