The research from the topic announced was conducted in an experimental field of Agricultural Chemistry department which is located in B.U.A.S.M.V. "King Michael I of Romania" in Timișoara Didactic Station from Timișoara and after that in the research laboratory of the Soil Science Department from the Faculty of Agriculture. The field experiments have a factorial design with two factors, with wheat – maize- sunflower rotation. Each plot is sub-divided in four replicates, linear, with the size of 10 x 3 m (30 m2). The experiment was made about wheat using the zoned variety in the West Plain of the country, namely Alex Variety. The mineral fertilization has the best efficacy if is merged harmonious, and under analytic agrochemical control with the other agrophytotechnical measures which enhances the results of fertilizers application. The presence of nutritive elements in plants has not to be regarded at a simple accumulation, but their concentration must be linked with their physiological and biochemical purposes in plants metabolism.

wheat, chemical fertilizers, experiment, raw protein

Presentation: oral