Acţiunea fertilizanţilor organici Grinex şi Orgazot asupra creşterii şi dezvoltării alunului

The paper presents the results of the research carried out for the first time on the hazelnut culture regarding the fertilization with Orgazot and Grinex applied in the soil to the projection of the crown of the trees. Fertilizers improved the nutrient regime of the soil, increased the content of nitrogen, phosphorus and potassium in the leaves, which favored the accumulation of chlorophyll pigments (chlorophyll A, B and carotenoids), increased the growth of shoots and foliar surface of the leaves. The haz