F. Tahir*1,2 1Department of Biology, Faculty of Life and Science, Ibn Khaldoun University 14000, Tiaret Algeria, Laboratory of Biotechnology and Nutrition in Dry Areas 2Field Crops Technical Institute ITGC 14000 Tiaret, Algeria (Manuscript received 15 October 2023; accepted for public

Z. Zlatev Abstract. Laboratory experiments were conducted to study the effect of soil drought on leaf gas exchange and water relations of young sunflower plants (Helianthus annuus L.) – cv. Favorit and cv. Albena. Similar changes were established in the parameters tested. Significant

A. Ivanova, N. Tsenov Abstract. . Drought is a climatic specificity of the geography in Bulgaria. Under the effect of global climatic changes, drought becomes increasingly intense. A field trial investigated the effect of various mineral fertilization norms on the productivity of comm