Productivity of sunflower varieties and hybrids at applying of fertilizers in different ways on leached chernozem
The researches was conducted on leached chernozem with increased content of available nitrogen, active phosphates, with high content of exchangeable potassium and low content of active forms of boron, molybdenum, copper and sulphur in conditions of 2005-2007. It was studied usage of Akvarin 5 for presowing seed treatment and as foliar fertilizing of plants in phase of 2-4 leaves pairs appearance, and N<sub>30</sub>P<sub>30</sub> for applying during planting, as well as combined application of these two fertilizers. We studied influence of fertilizers and ways of its application on elements of sunflower yield, seeds yield, oil content in seeds and oil yield of hybrids Triumph, Jupiter and varieties Buzuluk and Albatross.