Growing technology for optimum yield and adjustment to year, field and cultivar/hybrid
2008
Marinkovic, B., Poljoprivredni fakultet, Novi Sad (Serbia) | Crnobarac, J., Poljoprivredni fakultet, Novi Sad (Serbia) | Jacimovic, G., Poljoprivredni fakultet, Novi Sad (Serbia) | Marinkovic, D., Victoria Group, Novi Sad (Serbia)
After analyzing weather conditions (precipitations, 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.
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