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Bulgarian Journal of Agricultural Science (BJAS)® is a peer-reviewed, open access, online and print journal, issued bimonthly. It has been published in English since 1995. It publishes original research papers, review articles and brief communications from all areas of agricultural science including agricultural economics, agroecology, agrochemisty and soil science, crop science, plant protection, animal science, veterinary medicine, fisheries and aquaculture, agricultural engineering, food technologies and other related areas.

ISSN 1310-0351 - print
ISSN 2534-983X - online

Publisher: Agricultural Academy of Bulgaria
Editor-in-Chief: Prof. Dr. Martin Banov
Executive editor: Snezhana Besarabova
E-mail: bjas_sb@abv.bg
Web: www.agrojournal.org

Bulgarian Journal of Agricultural Science
125, Tzarigradsko shosse Blvd., Block 1
1113 Sofia, Bulgaria

Print preparation: Ivo Nikov
Printing:BPS Ltd

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Note to contributors

Volume 26 Number 5 October 2020


Regression model of the formation of pasture with programmable productivity of the arid lands of the South-East European of Russia

Mikhail Y. Puchkov; Alexander V. Koshkarov; Maksim A. Lysakov; Konstantin V. Isaev; Elena G. Loktionova; Sergey D. Fomin; Elena S. Vorontsova and Vasily M. Strukov

Performance and forecast of Indonesian pepper exports to Italy

Agus Dwi Nugroho and Imade Yoga Prasada


The state of agriculture in Bulgaria – PESTLE analysis

Mihaela Mihailova


Optimization of stocking density and mixture ratio of tilapia and carp in rice-fish culture for higher bio-economic efficiency

Aum Mohai Minur Rahman, Mohammad Parvez Anwar, Ahmed Khairul Hasan, Ainun Nur Jyoti, Mohammad Shahjahan, Mohammad Kamal Uddin and Sabina Yeasmin

Efficiency of using stimulating preparations in pre-treatment of spring barley seeds

Sergey V. Mitrofanov and Nikolay N. Novikov


Oral toxicity of chitin synthesis inhibitors (CSIs) and plant extracts to rubber termite, Coptotermes curvignathus Holmgren (Rhinotermitidae: Isoptera)

Aran Ngampongsai, Surakrai Permkam, Wisut Sittichaya, Suraphong Saiboon and Kanok Maharat


Analysis of mancozeb and carbofuran pesticides residues in the production area of shallot (Allium cepa L. Var. ascalonicum)

Euis Nining, Rizal Sjarief, Zainal Alim Mas’ud, Sobir Sobir and Machfud Machfud


Influence of the water deficit on growth indexes and pests infestation of pepper mutant lines

Boyan Arnaoudov, Dima Markova and Yanina Arnaoudova

Grouping and evaluation of cornel-tree varieties according to some pomological indicators

Argir Zhivondov, Neli Keranova and Svetla Pandova

Genotype by environment interaction for grain yield in winter oat

Boryana Dyulgerova and Todorka Savova

Combining ability for the grain wet gluten content in durum wheat

Rangel Dragov


Application of monosodium methyl arsenate with diuron herbicide to control the characteristics of glyphosate-resistant Eleusine indica at oil palm plantations

Koko Tampubolon, Edison Purba, Mohammad Basyuni and Diana Sofia Hanafiah


Soil profile distribution of water repellency and relationships with properties and characteristics of Technosols from open-cast mining

Irena Atanassova, Plamen Ivanov, Toma Shishkov, Emil Dimitrov and Martin Banov


Effect of herbal supplements (nettle and rosehip) on the sperm quality in Danube White breed boars

Gergana Yordanova, Danail Kanev, Yordan Marchev, Radka Nedeva, Tanya Nikolova and Nadezhda Palova

Effect of different levels of dietary inclusion of Saccharomyces cerevisiae on growth performance and hematological parameters in broiler birds

Charles O. Osita, Augustine O. Ani, Chika E. Oyeagu, Eunice A. Akuru, Leonard C. Ugwuowo, Valentine C. Udeh and Uzochukwu J. Oliobi

Study on the conversion of energy and protein in fattening of Guinea-fowls up to 16 weeks of age by introducing “Clarc of distribution/ transformation”

Dimo Penkov and Matina Nikolova

Economic aspects of extruded soybeans’ usage in livestock and poultry

Olena Berbenets, Andriy Pugach and Olesya Lebedenko

Growing mulberry silkworm with аrtificial diet with added extract Tribulus terrestris L.

Tsvetelina Nikolova


Assessment of genetic diversity in sesame germplasm as an initial material for Bulgarian breeding programs

Stanislav Stamatov and Nikolaya Velcheva


The quality of goat milk and hygiene management practlices on farms in Vojvodina

Snezana Paskas, Jelena Miocinovic, Mila Savic, Branislav Vejnovic and Zsolt Becskei

Enzootic pneumonia of pigs – diagnostic notes (review)

Roman Pepovich


Influence of enzyme maceration and alcoholic fermentation temperature on the terpenes concentration in Muscat wine distillates

Nadezhda Blagoeva, Ivayla Bazhlekova, Hristo Spasov and George Kostov

Monitoring the content of biogenic amines in red wines subjected to malolactic fermentation

Ionel Popescu-Mitroi, Dana Gina Radu, Claudia Mureşan, Andreea Lupitu, Dana Copolovici and Lucian Copolovici

Assessment of extracts from dry fruits of Vaccinium myrtillus L. and Ribes nigrum by regression analysis

Antoaneta Georgieva, Radostina Stefanova and Krasimir Krastev


Identification of parameters of pneumatic and mechanical seeding device under the influence of vacuum

Kateryna Vasylkovska, Oleksii Vasylkovskyi, Serhii Leshchenko, Mykola Sviren and Mykola Moroz