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Soil water balance was studied in a 25-year-old experiment, on chernozem soil, in different crop-rotation systems (mono-, bi- and triculture) in dry (2007) and rainy (2008) seasons, in maize production. Soil water deficit values in maize production were much lower in 2008 than in 2007 in non-irrigated and irrigated plots of three crop rotation systems because of favourable precipitation supply. We found difference between the water deficit values of two irrigation treatments. We measured lower values in irrigated plots of three crop-rotation systems before sowing: non-irrigated plots in monoculture 105 mm, in biculture 101 mm, in triculture 121 mm and irrigated plots in monoculture 90 mm, in biculture 91 mm, in triculture 111 mm. Soil waterstock started to decrease with the rise in average temperature and, despite an increase in precipitation quantity, we calculated higher water deficit values. Precipitation in August and the high average temperature intensified the water deficit. Water deficit showed its highest values in early September. We examined the water balance of the soil profile in 0–2.0 m and we concluded that the water deficit of the 0.8–1.2 m soil layers was most intensive in both non-irrigated and irrigated treatments, because of significant root mass. Our results showed that irrigation had a more important influence on the yield in a dry cropyear (2007 characterized by abiotic, water stress) than in an optimum water supply cropyear (2008).

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52 Dani, M. — Pepó, P.: (2005). The yield potential utilization of some sunflower hybrids in different cropyear. Cereals Research Kommunikations, 33.1. 193–196.pp

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By using the baking quality parameters from a long-term experiment the effect of fertilization (N+PK) on wet gluten contents and farinograph values were determined on chernozem soil under continental climatic conditions. In the average of years and varieties fertilization highly increased the wet gluten content (in the control treatment 27,6 %, in the N 300/150 +PK fertilizer treatment 35,97 %). Fertilizer application also had favourable effects on farinograph values. These effects, however, were rather moderate (in the control treatment 56,2, in N 300/150 +PK fertilizer treatment 61,4).We could increase the stability of the quality by using of appropriate fertilizer doses. The correlation between fertilization and wet gluten content was medium (0.343 xx –0,694 xx ) and between fertilization and farinograph values was weak (0.030–0.419 xx ).

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. — Pepó, P. (2005): The yield potential utilization of some sunflower hybrids in different crop-years. Cereal Research Communications 33(1) 193–196. Pepó P. The yield potential

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affected by cropyear and plant nutrition — cereal research Communications, 34:(1) 473–476 pp. Nagy E. Grain yield and baking quality of wheat as affected by cropyear and plant nutrition

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Balogh, Á., Pepó, P. 2008. Cropyear effects on the fertilizer responses of winter wheat ( Triticum aestivum L.) genotypes. Cereal Res. Commun. 36 :732–734. Pepó P

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