During the research aimed at reducing the cost price of poultry feed and increasing their productivity lysofort bio­emulator and L­carnitine supplement were used. 4 groups of ROSS­308 broilers were made (100 heads each). The control group received feed portion corresponding to the nutrition value of ROSS­308 cross boiler feed, containing defined content of exchange energy (in the initial phase­3050 kcal/kg, in the growth period­3100 kcal/kg, and in the final stage­3200 kcal/kg). In the experimental groups, the efficiency of the exchange energy was artificially reduced, mostly due to low content of vegetable oil. Feed conversion, head maintenance, live broiler chickens of different ages, growth dynamics, average daily weight growth, meat qualities of slaughtered poultry were studied in all groups. According to the research results, compared with the control group, the indicators of feed conversion and average daily weight growth of broiler chicken fed by portions containing bio­emulator and L­carnitine were improved, which testifies to the increase in the availability of energy. Due to the synergy of joint application of bio­emulators and L­carnitine, feed conversion is improved, production costs and cost price are reduced, the productivity of broilers is increased, as well as the profitability of poultry production (not at the cost of increasing the consumer prices) and meat quality is improved (as a result of increasing the amount of protein and reducing fat). As an efficient and safe means to increase the profitability of poultry production, the bio­emulators and L­carnitine can be used in the feed of meat poultry.

The aim of the study was to prevent latent mastitis in cows by sanitizing the udder teats with amyloyodin solution (blue iodine). Research work on prevention of mastitis in cows was carried out during 2022 in the Balahovit teaching and experimental farm of ANAU, as well as in the laboratories of the ANAU Research Center for Veterinary Medicine and Veterinary Sanitary Examination on 14 Caucasian brown cows, with seven heads in each group. In the experimental group, the treatment of teats after milking with an interval of 12 hours was carried out by applying amyloyodin to the teats of the udder by dipping them into small plastic cups filled with a solution of blue iodine to three­ quarters of the dish. The teats of cows in the control group were not treated with blue iodine, but were washed with warm clean water immediately after milking. To study the microbial contamination of the cow udder, swabs were taken from the teat skin in animals of the experimental and control groups. A microbiological study of swabs indicates that after milking the number of colonies of microorganisms in the experimental and control groups is approximately the same – 139 and 143, respectively. However, the use of amyloyodin showed preventive efficacy and longer hygienic protection of the teats skin in animals, i.e. the number of colonies in the experimental group decreased after 30 minutes (from 139 to 8), and in the control group, confluent growth of colonies was observed after the same period of time.

Drought is one of the main abiotic stresses that depends on soil type and rainfall patterns on agrarian land. However, it is mainly responsible for major yield losses in crops. Climate change further compounds the challenges to advanced crop yields. Failure stress reduces crop yield. This research was conducted on grain yield in fifteen Armenian and Iranian wheat varieties to evaluate grain yield and drought tolerance indices. The study was performed with three replications under normal and drought-stress conditions for two years. According to grain yield, eight drought tolerance indices are estimated, including stress tolerance (STI), tolerance index (TOL), stress susceptibility index (SSI), mean productivity (MP), harmonic mean (HM), geometric mean (GMP), yield index (YI), and drought index (DI) for all varieties. The combination of yield analysis, eight drought tolerance indices, and correlation revealed that Navid, Voskehask, Sabalan, and Zare varieties were desirable for drought tolerance. Other varieties were identified as semi-tolerant and sensitive to drought stress.

Agriscience Mechanics is an exciting new approach that connects important science principles with mechanical skills. This approach adds meaning and excitement to the traditional areas of agricultural mechanics. It is right in line with the expectations of agricultural industry. - Preface.

Presents a modern approach to the agricultural industry, including horticulture, forestry, natural resources, and the environment, with emphasis on the basics of plant and animal production.

This new Fifth Edition provides students with a comprehensive introduction to the agriculture industry. Updated photos and easy-to-understand text introduce students to a variety of interesting agriscience concepts and skills, including agriscience career clusters and pathways, how science is used in agriculture, real-world applications of agriscience, and what it means to be a professional in the agriscience industry. New chapters on leadership and student organizations such as FFA have been added with a focus on developing the traits that define a successful member of the agriscience community. Expanded coverage of genetics, biotechnology, food safety, entomology, and agricultural mechanics makes this edition a comprehensive learning tool for students interested in an agriscience career. - Back cover.

Reports on a student-focused teaching approach for agricultural sciences in secondary education.