Influence of ways of application of microelements and plant growth regulators on sunflower productivity

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, cobalt, copper in conditions of 2005-2007. Influence of ways of application of complex fertilizers and plant growth regulators on sunflower seeds productivity and oil yield was studied. Efficiency of different agro-chemicals and ways of its usage is revealed.