G. Panayotova1*, S. Kostadinova2, S. Stefanova-Dobreva3, A. Muhova3 1Department of Plant production, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria 2Department of Agrochemistry and Soil Science, Faculty of Agronomy, Agricutural University, 4000 Plovdiv, Bulgari

G. Ören1*, H. Çelik2 1Department of Soil Science and Plant Nutrition, Institute of Natural Sciences, Bursa Uludag University, Bursa, Turkey 2Department of Soil Science and Plant Nutrition, Faculty of Agriculture, Bursa Uludag University, Bursa, Turkey (Manuscript received 14 August

G. Panayotova1*, M. Almaliev2, S. Kostadinova2 1Department of Plant Production, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria 2Department of Agrochemistry and Soil, Faculty of Agronomy, Agricultural University, 4000 Plovdiv, Bulgaria (Manuscript received 29 Se

G. Panayotova1*, S. Kostadinova2 1Department of Plant Production, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria 2Department of Agrochemistry and Soil Science, Faculty of Agronomy, Agricultural University, 12 Mendeleev, 4000 Plovdiv, Bulgaria (Manuscript receiv

V. Valcheva*, K. Trendafilov, M. Almaliev Department of Agro-chemistry and Soil Science, Faculty of Agronomy, Agricultural University, 12 Mendeleev, 4000 Plovdiv, Bulgaria Abstract. The aim of this study was to investigate the nitrogen mineralization potential of alluvial meadow soil

A. Gencheva* Nature Sciences Department, New Bulgarian University, 21 Montevideo, 1618 Sofia, Bulgaria Abstract. The present paper aims to assess nitrogen circulation in an eco-technical system for egg production. The experiments were conducted in modelled conditions in an anthropogen

G. Panayotova, A. Stoyanova Abstract. During the period 2008 – 2010 the response of durum wheat cultivar Progress, grown on Eutric Vertisols at the field of the Field Crops Institute, Chirpan, Bulgaria to foliar feeding with universal liquid fertilizer MaxGrow was studied. The fertili

K. Trendafilov, V. Valcheva, S. Todorova Abstract. In conditions of combined field experiment the influence of liming with Ca(OH) was studied in rates of 1,0, 2,5 and 5,0 t/ha on the input of nitrogen, 2 phosphorus and potassium in the leaves of fertility vines from varieties Sauvigno

D. Terziyski, L. Hadjinikolova Abstract. The aim of this study is related with the characterization of the chemical parameters of sediments obtained from intensive carp ponds, as a natural biological product. Vertical differentiation in the levels of the studied chemical indicators of