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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

Address:
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

AGRICULTURAL ECONOMICS

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


AGRICULTURAL MANAGEMENT

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

Soo-Eun Kim and Jun Ho Seok


ECOLOGICAL FARMING

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


SUSTAINABLE AGRICULTURE

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


PLANT SCIENCE

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


PLANT GENETICS

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

Neli Grozeva and Stefka Atanassova


AGROCHEMISTRY, SOIL SCIENCE AND ECOLOGY

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


ANIMAL SCIENCE

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


FOOD SCIENCE AND TECHOLOGIES

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


AGRICULTURAL ENGINEERING

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

Igor Evgenievich Priporov