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- W2786971859 abstract "After analyzing weather conditions (precipitation, temperatures, potential ETP, actual ETP, precipitation deficits), significant changes were observed. The present paper discusses the 1963-2007 and 1988-2007 periods. Precipitation was divided into three categories: low (the 25% of the years with the lowest precipitation), high (the 25% of the years with the highest precipitation) and average precipitation (the 50% in the middle). In the last 25 years, the results showed, dry years had 10.4% less growing season precipitation than the 45-year average, while wet ones had 8.9% more. A similar situation was observed for total precipitation too. An analysis of the aforementioned water balance components in several crop species (sugar beet, maize, sunflower, and soybean) showed that dry years had more pronounced water deficits in recent years. Nitrogen fertilizer application and seeding rate should be adjusted to the amount of winter precipitation, nitrogen distribution down the soil profile, and each individual field and hybrid/cultivar. When winter precipitation is low, the maize seeding rate should be reduced by 10-20% depending on the distribution of mineral nitrogen down the soil profile. A similar seeding rate adjustment should be made with sugar beet too (60-80.000 plants/ha). With optimal and high winter precipitation, stand density should be maintained at the recommended level. In the case of high winter precipitation, and depending on nitrogen distribution in the soil, nitrogen fertilization should increased so as to produce an optimal, realistic yield. Nitrogen fertilization in the spring should be carried out according to the balance method using the following formula: y = a x b S(c + d) eC. Good results in agricultural production can be achieved only through a balance between all cultural practices and weather conditions on the one hand and the potential of the growing field and the cultivar/hybrid on the other." @default.
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- W2786971859 date "2008-01-01" @default.
- W2786971859 modified "2023-09-23" @default.
- W2786971859 title "Growing technology for optimum yield and adjustment to year, field and cultivar/hybrid" @default.
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