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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. DSc. Martin Banov
Executive editor: Vanya Draganova
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 28 Number 2 April 2022


Competitiveness in international orange trade

Attila Jambor and Dorottya Czirkl

The financial impact of mad cow disease to public budgets in Czech Republic from 2001–2019

Richard Pospisil


Price transmission between GMO-free organic and conventional milk in Austria

Soo-Eun Kim and Jun Ho Seok


The effectiveness of the use of biological preparations in the production of potatoes

Irina Gazdanova, Fatima Gerieva and Timur Morgoev

Potential of endophytic phosphorus-solubilizing bacteria to improve soil fertility, P uptake, and yield of maize (Zea mays L.) cultivated in alluvial soil in dikes in Vietnam

Nguyen Quoc Khuong, Le Thanh Quang, Le Vinh Thuc, Tran Ngoc Huu, Le Thi My Thu, Tran Thi Bich Van, Do Thi Xuan, Nguyen Hong Hue, Nguyen Thi Thai Le, Pham Duy Tien, Tran Chi Nhan, Ly Ngoc Thanh Xuan and Nguyen Thi Thanh Xuan

Effect of Azotobacter sp. inoculation on sweet potatoes (Ipomoea batatas L.) yield in lead-contaminated soil

Vera Oktavia Subardja, Reginawanti Hindersah, Rija Sudirja and Pujawati Suryatmana

Evaluation of mechanism of plant protective attributes of root colonizing bacteria against phytopathogenic fungi

Chandni Upadhyaya and Ishita Patel


Effect of the probiotic BAYKAL EM-1 on some hematological and biochemical parameters and faecal score of suckling pigs

Sonya Ivanova, Tanya Nikolova and Albena Dimitrova

An analytical study of investment in the use of treated wastewater project in the Egyptian agricultural sector

Yehia Abd El-Rahman Yehia and M. M. Soliman Doaa Mamdouh

Fungi and their potential for biofuels production (review)

Jeny Miteva-Staleva, Rumyana Eneva and Venelin Hubenov


Study of yield and stability by common winter wheat varieties by changing climatic conditions in Sadovo region

Evgeniy Dimitrov, Zlatina Uhr and Radoslav Chipilski

Influence of agricultural cultivation methods on the physicochemical and colour parameters of Florina variety apples immediately after harvest

Galya Dobrevska, Petya Ivanova and Manol Dallev

Morphological and yield-related traits of semi-dwarf and mid-tall cultivars of spring barley under Southeast Bulgarian conditions

Nikolay Dyulgerov and Boryana Dyulgerova

Chemical composition, in vitro gas production and relative feed value of rose flower wastes (Rosa damascena Mill.) from conventional and organic production

Mariya Gerdzhikova, Mima Todorova, Neli Grozeva, Ana Dobreva and Nadezhda Petkova

Moldovan soybean varieties testing in the condition of North Bulgaria

Galina Naydenova Mariana Radkova and Anelia Iantcheva


Karyological and morphological variability of Suaeda salsa (L.) Pall. in Bulgaria

Neli Grozeva and Stefka Atanassova


Determination of the soil equivalent in leached smolnitsa and alluvial-meadow soils by pot experiment

Zdravka Petkova, Tsetska Simeonova, Maya Benkova, Lyuba Nenova, Iliana Gerasimova, Vanya Lozanova, Ani Katsarova, Martin Nenov, Irena Atanasova and Margarita Nikolova

Diagnostic of soil forming processes of Zheltozem podzolic (pseudopodzolic) soils from Strandzha Mountain

Toma Shishkov and Emil Dimitrov


Blood biochemical profile as an objective measure of welfare in Lacaune sheep

Ivelina Nedeva, Todor Slavov, Veselin Radev, Dimitar Panayotov and Ivan Varlyakov

Body weight, morphometric measurements and number of teats of Boer goat does, reared in Bulgaria

Dimitar Panayotov

Effect of different levels of high-protein sunflower meal in compound feeds on broiler’s carcass characteristics and meat quality

Ivan G. Penchev, Sashka Chobanova, Nikolay Karkelanov


Physicochemical characteristics of Bulgarian bee honey: Part 1

Svilen Lazarov, Petya Veleva and Ivanka Zhelyazkova

Challenge test studies on Listeria monocytogenes grown in ready-to-eat dry cured pork product stored at home-simulated conditions

Mihail Milanov and Todor Stoyanchev


Mathematical model of the separation process of sunflower seeds in innovative air-sieve grain-cleaning machine

Igor Evgenievich Priporov