L. Nenova*, M. Benkova, Ts. Simeonova, I. Atanassova Institute of Soil Science, Agrotechnologies and Plant Protection “N. Poushkarov”, Agricultural Academy, 1331 Sofia, Bulgaria (Manuscript received 20 January 2023; accepted for publication 14 December 2023) Abstract. The effectivenes

M. Nankova1*, A. Ivanova1, N. Tsenov2 1Dobrudzha Agricultural Institute, 9520 General Toshevo, Bulgaria 2Agronom I Holding, 9300 Dobrich, Bulgaria Abstract. Under conditions of Haplic Chernozems, the dynamics and the intensity of dry matter increase in the spikes of the common winter

L. Hadjinikolova, D. Terziyski, A. Ivanova Abstract. . This study is related to the development of mineral fertilization schemes aimed at balancing the content and the N:P ratio in the water of carp ponds and its impact on main physicochemical and hydrobiological environmental factors