ASSESSMENT OF PRODUCTION YIELD BASED ON THE INTERACTION BETWEEN NITROGEN LEVEL OF FERTILIZATION AND WINTER WHEAT VARIETY CULTIVATED AT CARACAL, AN IMPORTANT AGRICULTURAL AREA OF ROMANIA

Abstract

The aim of this study was to analyze the effect of variety, nitrogen fertilizer rate and their interaction on yield and to determine the economic feasibility of application the fertilizer and varieties for optimum yield grain which are two key drivers that contribute guiding the future with efficient agronomic practices to guarantee food security in the advent of the most significant changes for agriculture. The subject of the experiment consisted in testing during one wheat growing season, twenty-one modern winter wheat varieties fertilized with nitric and ammoniacal N in different rates - 120, 150 and 170kg N ha^-1. The variety contributes to the production with 61%, the fertilizer rate with 2.4% and the interaction between the factors with 19.4%. The highest production in all fertilization level and types of N was achieved by the Rubisko variety. The highest value7,067 kg ha^-1 is obtained at 120 kg ha^-1 nitric N rate, and the lowest 6,252 kg ha^-1 at 150 kg ha^-1 ammoniacal N. We concluded that an increase in wheat grain is not linearly linked to an increase in N dose.