G. Milev* Dobrudzha Agricultural Institute, 9520 General Toshevo, Bulgaria Abstract. A field experiment was carried out with sunflower (Helianhtus annuss L.) hybrid San Luka during 2011 – 2013 in the trial field of Dobrudzha Agricultural Institute under conditions of slightly leached

N. Markova Ruzdik1*, D.Valcheva2, D.Vulchev2, Lj. Mihajlov1, I. Karov1, V. Ilieva1 1Faculty of Agriculture, “Goce Delchev” University, 2000 Shtip, Republic of Macedonia 2Institute of Agriculture, 8400 Karnobat, Bulgaria Abstract. The aim of this paper was to determine the correl

G. Milev1*, R. Todorova2 1Dobrudzha Agricultural Institute, 9520 General Toshevo, Bulgaria 2Trial Station on soybean, 5200 Pavlikeni, Bulgaria Abstract. During 2011 – 2013 a multifactor field trial with the soybean cultivar Richie was carried out in the experimental field of Dobrudzha

M. Dimitrova-Doneva, D. Valcheva, D. Vulchev, B. Dyulgerova*, M. Gotcheva, T. Popova Abstract. The study was conducted in the period 2009 – 2012 in the experimental field of the Institute of Agriculture, Karnobat, Bulgaria. The aim of this study was to assess the grain yield of 21 adv

M. Ilchovska, I. Ivanova Abstract. A total of 21 experimental maize hybrids and 3 standards were studied and characterized with regard to the traits: length of the ear, diameter of the ear, number of the rows of the ear, weight of the ear, weight of the grains of the ear, number of th

M. Ilchovska Abstract. For the purposes of preliminary evaluation of the combining ability for grain yield of 12 mutant maize lines a top cross method for early testing and the mathematical model of Savchenko(1993) for analysis of the general combining ability and specific combining a

N. Petrovska Abstract. The present study shows the results from testing experimental hybrids for grain yield which were obtained by the partial diallele system by Savchenko (1966, 1978) in 2004. General combining ability (GCA) and specific combining ability (SCA) of 10 late inbred mai

V. Koteva Abstract. The investigation was carried out in a field certified for organic agriculture, on soil type Pellic vertisol (FAO) during 2004 – 2012. The changes in soil acidity, total humus content and reserves of mineral nitrogen, mobile phosphorus and available potassium in so

G. Delchev, N. Georgieva, I. Nikolova Abstract. With the purpose to study the stability of mixtures among preparations with different biological effect on the basis the grain yield in spring vetch a three-factor field trial was carried out during the period 2007-2009 in Institute of F

V. Valkova Abstract. General Combining Ability (GCA) and Specific Combining Ability (SCA) of sixteen newly stabilized early maize lines were evaluated by Savchenko’s method (1978). The lines were tested in five testers by different genetic groups, possessing established high gen