bluuebunny/crossref_metadata_2025 huggingface dataset:
Changes in the dynamics of humus of the soil content in the continuous sowing of cotton
Authors: Khalikov Bakhodir , Negmatova Surayyo , Makhmudov Utkir
Published: December 2023

This article is one of the only long-term scientific experiments in Central Asia, which has been conducted for 96 years since 1926 at the Scientific Research Institute of Cotton Breeding, Seed Production and Agrotechnology in Kibray district of Tashkent region. Option 1 monoculture, 30 t / ha fertilizer per hectare + 30 kg / ha phosphorus per year, Option 2 monoculture, N P K 250:175: 125 kg / ha per year and Option 3 monoculture, absolute fertilizer, control options humus content 96 analytical scientific data on changes during the year. In the article, the highest decrease in humus content was observed in the control variant where was not used fertilizers, the amount of humus after 20 years was 21.4% or 11.4 t / ha compared to the initial amount, after 40 years it was 30.9% or 16.46 t / ha, after 60 years it was 35.7% or 19.05 t / ha, after 80 years it was 49.3% or 26.29 t / ha, and 54.3% or 29.17 t / ha after 96 years, this indicator is 12.2% -6,487 t / ha. In the experiment, the highest rate of humus reduction for 96 years was 54.3% in the control variant, 30 t / ha of manure + 25 kg / ha per year in P2O, 47.5% in variant 1, N P K 250:175:125 kg / year. The norm was found to decrease by 36.9% in variant 2, where the norm was applied.
Viability assessment of quince cuttings (Cydonia Mill.) and pear pollen (Pyrus L.) after cryoconservation in liquid nitrogen vapor (-183185°C)
Authors: Chepinoga I.S. , Erastenkova M.V. , Khokhlenko А.А. , Verzhuk V.G.
Published: December 2023

The viability of cuttings before and after cryopreservation in nitrogen vapor was assessed on six varieties of quince and seven varieties of pear pollen taken for study in the field gene bank of the Krymsk Experimental Breeding Station – VIR branch. Post-cryogenic evaluation showed that the viability of quince cuttings averaged 51.0±2.8%, which exceeds international standards (40%) and the requirement for specimens recovered after cryostorage. Storage of cuttings at -5°C can be used for a short period of time, up to 1-1.5 years. The viability of pear pollen revealed small initial values after collection in the garden (from 0 to 6.95%), but it increased in varieties by 4-10 times after cryopreservation in nitrogen vapor. According to the initial values, the Georgievskaya Early variety stood out 6.95%, and after cryopreservation 52.81% and Suksen early ripening (4.37% initial value and 47.5% after cryopreservation), Elite 12-69-37 with zero initial value after cryo pollen viability was 25.75%.
The relative copy number of mitochondrial and chloroplast DNA in young and mature leaves of different grape varieties
Authors: Vodolazhsky Dmitry I. , Kryukov Lavr A.
Published: December 2023

The copy number of DNA matrices of subcellular organelles (plants) can serve as an indicator of the intensity of photosynthesis and oxidative phosphorylation processes. We assessed the relative copy numbers (RCN) of mitochondrial and chloroplast DNA in young and mature leaves of three grape varieties: ‘Traminer Pink’, ‘Chardonnay’, and ‘Syrah’, grown under field conditions. Leaf samples (5–10 mg) were randomly selected from each group of plants for subsequent total DNA extraction. The qRTPCR reaction was performed using LightCycler 480 SYBR Green I Master Mix (LifeScience, Roche) and a LightCycler 96 Automatic Analyzer (Roche Life Science). The relative copy numbers of the NAD1 gene (mitochondrial DNA) and rps16 gene (chloroplast DNA) were determined using the GAPDH gene (chromosomal DNA) as a reference. Quantitative assessment was conducted using the 2--Ct и 2---Ct algorithms. It has been established that the relative copy number (RCN) values of chloroplast and mitochondrial DNA vary and depend on the grape variety and leaf maturity. RCN of chloroplast and mitochondrial DNA is significantly higher in mature grape leaves of all studied varieties, indicating a higher intensity of photosynthesis and oxidative phosphorylation in mature grape leaves compared to young leaves. When assessing the MacroErgic Balance (MEB) indicator, it can be concluded that from 2 to 4% of the energy obtained in chloroplasts through photosynthetic processes is used for the production of macroergic compounds in the mitochondria of various grape varieties in both young and mature leaves. The experimental scheme we have developed can be successfully used as a testing system to assess the potential yield of various grape varieties.
The Effect of Intercropping on the Growth and Yield of Winter Wheat in a Short Rotation System
Authors: Bakhramova Nilufar , Mamadiyorov Farxod , Qurbonov Mirjalol , Gafurova Lazizaxon , Mazirov Mixail
Published: December 2023

In the article, it is stated that in the conditions of Kashkadarya region, it is important to increase the growth and productivity of winter wheat by applying local fertilizers, planting repeated and intermediate crops in the system of alternating sowing of cotton and grain. The phenological and biometric indicators of winter wheat were recorded and the differences between variants were noticed. In the rotation system, the repeated planting of one type of crop in the same area every year, the use of homogeneous agrotech k measures, the growth and productivity of winter wheat are emphasized. On the contrary, the use of local fertilizers, planting of repeated, intermediate and partner crops has a positive effect on the growth and productivity of winter wheat. The obtained results were summarized and mathematically and statistically processed.
Heredity and Variability of Early Maturity of Cotton Hybrids Developed By Participation of the Introgressive Progenies
Authors: Namazov Shadman , Matyokubov Sukhrobbek , Sadiqova Ozoda , Mamarahimov Bunyod , Jololov Akmaljon
Published: December 2023

In the article described the results of the analysis of the dominancy and variability of the main components of early maturing, i.e. the “germination-50% flowering” and the “germination-50% maturing” periods of F1-F4 hybrids developed by the participation of the introgressive cotton progenies. As result of investigations there are found out mainly negative heterosis, full dominance and intermediate inheritance, i.e. early maturing occur for the “germination 50% flowering” and “germination-50% maturing” periods at hybrids developed by the participation of introgressive cotton progenies. It was concluded possibility of using of them in the breeding of F1 hybrids with high heterosis. The cotton progenies PL-4684-86/16 of; PL-470/1/16; PL-58/16 and PL-588/16 and hybrid combinations PL-4679-81/16 x Jarkurgan; PL-58/16 x Jarkurgan; PL-200/16 x Jarkurgan; PL-4747-48/16 x Jarqurgan and PLBSG/16 x Jarqurgan developed through introgressive selection method were recommended to be widely used in studies on improvement of early maturity.
Architecture of economic activity efficiency of agricultural fruit producers of the region under sanctions
Authors: Lysenko Yu.V. , Kalmakova N.A. , Dubynina A.V. , Lysenko M.V.
Published: December 2023

In the current realities, it is engineering and dealer services that take into account the balance of interests to ensure the development of management decisions that contribute to improving the quality of activities of fruit growing organizations in the region, the effective use of engineering innovations and equity capital. During the study, an assessment was made of entrepreneurial activity, the duration of the operating and financial cycles, financial stability of engineering and dealer organizations, and a factor analysis of return on capital was carried out, using the example of manufacturers of agricultural machinery for fruit growing. The assessment of indicators included an assessment of turnover of current assets, profitability, SWOT analysis and identification of risks of reducing the efficiency of business activities, taking into account factors affecting the optimization of leverage. Low profitability of the engineering and dealer business is associated with an ineffective pricing strategy, setting low prices when participating in government contracts and a significant amount of variable costs in the overall cost structure. To improve the situation, it was proposed to optimize the work of dealer centers and revise the pricing policy.
Enhancing Environmental Awareness and Sustainable Communication Skills in Maritime Education
Authors: Bernadtua Simanjuntak Marudut
Published: December 2023

This research study investigates the integration of environmental perspectives and sustainable communication skills into the Standard Campus Communication Phrase (SCCP) program at Sekolah Tinggi Ilmu Pelayaran Jakarta. In alignment with the theme of Environmental Perspectives in Maritime Education and the sub-themes of teaching sustainable maritime practices and techniques, integrating environmental education into maritime curriculum, promoting awareness of maritime environmental issues among students, and the role of English language education in promoting maritime environmental awareness, this study aims to prepare maritime cadets for excellence in communication while fostering environmental consciousness. The maritime industry faces escalating environmental challenges, necessitating a proactive approach in equipping cadets with both effective communication skills and an understanding of sustainable practices. Leveraging the researcher’s expertise in culture, literature, English for Specific Purpose (ESP), English as a Second Language (ESL), and Maritime English, this research focuses on sustainable maritime cadets and their preparation for effective communication. The research adopts a comprehensive mixed-methods approach, encompassing surveys, classroom observations, communication skills assessments, and content analysis of SCCP materials. The primary objectives are to assess the current state of environmental awareness among maritime cadets, evaluate the effectiveness of SCCP in improving communication skills, and examine the integration of environmental perspectives within the SCCP curriculum. The findings of this study will significantly contribute to maritime education by highlighting the pivotal role of English language instruction in promoting sustainable communication skills and environmental consciousness. The research outcomes will provide invaluable insights to educators, curriculum developers, and policymakers involved in maritime education. By preparing cadets to excel academically and professionally while emphasizing effective communication and environmental stewardship, this research aims to produce maritime graduates who are not only proficient in English but also equipped to navigate the environmental complexities of the global maritime industry.
Maritime Context in Learning at School: Systematic Literature Review
Authors: Susanti Susanti , Nainggolan Elsa Ernawati , Siregar Nur Asma Riani
Published: December 2023

The aim of this research is to determine the maritime context and the implementation of the integration of the maritime context in learning at school. The method used in this research is a qualitative method with a systematic literature review or literature study type method. The research results show that the maritime context is a situation that utilizes all the potential at sea, be it fisheries, maritime affairs, mining, tourism and transportation. Implementation of maritime context integration in learning at school is the process of implementing or carrying out an activity that integrates maritime insight, be it fisheries, maritime affairs, mining, tourism and transportation into the process of teaching and learning activities at school such as in material/content and learning media. By integrating the maritime context in learning activities, it can make it easier for students to understand learning concepts by observing and viewing learning in the surrounding environment.
Heavy Metal Pollution in Indonesian Waters
Authors: Yusfaddillah Anita , Dwi Saputri Riski , Edelwis Tri Widya , Pardi Hilfi
Published: December 2023

Marine pollution, including heavy metals, is prevalent in Indonesian waters. Previous studies have found evidence of Pb, Cd, Hg, Al and Fe metal contamination in sediments and green mussels. This study used survey research. Heavy metal pollution is increasingly accumulating so that if it is not controlled it is feared that it will have an impact on public health, especially people who live around the coast. The research method was conducted using survey techniques. This study aims to estimate the burden of heavy metal pollution in the ocean. The research was conducted in 5 (five) areas of Indonesia, namely the East Coast of Sumatra, Winongo River in Yogyakarta, Semarang Bay, Bandengan Waters Kendal Central Java, and Ratai Bay Pasewaran Regency in areas with high human and heavy metal impacts. On average, the total results of heavy metal pollution exceed environmental quality standards. The situation in the 5 (five) research areas shows heavy metal pollution is very concerning because it is higher than the marine quality standard. The average concentrations of the measured elements in water were Al >Fe > Cu > Cd, with average values in descending order of 1.08 mg/L, 0.545 mg/L, 0.035 mg/L, and 0.005 mg/L, respectively. Environmental management should be implemented with the aim of reducing heavy metal pollution in Indonesian waters.
Developing Rigorous Mathematical Thinking Approach-Based Learning Materials for Sequences and Series Concept at High School Level in Tanjungpinang
Authors: Astuti Puji , Febrian Febrian , Dwi Pratiwi Weni , Sukma Hayati Hutami , Dhita Aruny Yolanda , Diniati Sheila
Published: December 2023

Mathematics encourages logical reasoning and critical thinking. Rigorous thinking helps in analysing problems to decision-making and ensures that solutions are accurate and reliable. Prior research indicated students’ lack of those abilities when learning the concept of sequences and series. Therefore, this research aims to develop learning materials for the concept of sequences and series based on rigorous mathematical thinking (RMT) approach. The learning materials developed with the ADDIE model include mobile learning, student worksheets, and test instruments, which provide clear explanations, examples, problem-solving activities with RMT approach, and assessments enabling teachers to evaluate students’ understanding of mathematics concepts of the sequences and series. The learning materials were validated using a questionnaire by mathematics experts. The quantitative and qualitative data results show that the mobile learning, student worksheets, and test instruments are valid. Mobile learning that was developed and tested valid entails that the study can add to a new learning strategy that proposes technology and digital tools to engage students in the learning process and promote RMT.
Expert Judgement on Instrument for Measuring Healthy Lifestyle Knowledges and Behaviors of Senior High School Students in Coastal Area of Tanjungpinang
Authors: Sarkity Dios , Fernando Adam , Pratama Yudi , Intasir M. Pemberdi
Published: December 2023

Healthy lifestyle behavior is the main asset in dealing with various health issues, including for people in the Islands region. Healthy lifestyle behavior implementation must be based on scientific knowledge. An instrument is needed to measure students’ healthy lifestyle behaviour-related science knowldge and students’ lifestyle behavior. This research aims to determine the content validity of the instrument for measuring science knowledge related to healthy living behavior and students’ healthy lifestyle behaviour. This research was quantitative descriptive. The instrument was developed based on 8 main indicators including physical activity, nutritious food consumption, sleep duration, cigarette and alcohol consumption, use of clean water, hand washing habits, use of bathrooms and toilets, and waste disposal culture. The instrument was validated by 8 experts and analyzed using the Aiken Formula (V). The results of this validity test showed that the instrument was valid for aspects of relevance and presentation (V = 0.96), accuracy of language (V = 0.88), and conformity with conceptual and operational definitions (0.94). These results indicate that the instrument can be continued with empirical validity and reliability tests until a valid and reliable instrument is obtained.
Physical Components Analysis on Sportfishing as A Maritime Community Culture
Authors: Pratama Yudi , Sarkity Dios
Published: December 2023

Sportfishing is an activity that is often carried out by people in maritime areas. Even though it is called Sportfishing, the physical components used in this activity need to be studied in depth. This research aimed to analyze the physical components found in Sportfishing which is part of the culture of maritime society. This research was a descriptive research. Data was collected through literature review and documentation in the form of videos showing the sport of fishing. The research results show that in Sportfishing there are several physical components used including strength, balance, reaction, endurance and explosive power. These physical components can be trained through physical education lessons at school with a variety of materials. Especially in the maritime area, this material can be related to Sportfishing where the physical components trained will be useful for students in carrying out Sportfishing activities.
Fostering	Intercultural Understanding and Environmental Consciousness in Maritime Education
Authors: Bernadtua Simanjuntak Marudut , Zuriyati Zuriyati , Rini Utami Sintowati , Rahmat Aceng , Setiadi Samsi
Published: December 2023

Maritime education stands at the crossroads of an international industry, necessitating the preparation of cadets who are not only technically proficient but also culturally competent and environmentally conscious. This research delves into the integration of intercultural understanding, environmental perspectives, and English Language Education (ELE) within the English Environment and Habitual English Communication Program (SCCP) at Sekolah Tinggi Ilmu Pelayaran - Jakarta (STIP Jakarta). The study explores the current state of integration, recognising the successes in fostering intercultural understanding and environmental awareness among maritime cadets. Furthermore, it identifies the challenges that require attention, including the need for continuous curriculum development, practical applications, and ongoing language proficiency development. The implications extend to maritime education institutions worldwide, emphasising the importance of cultivating a more holistic and responsive approach to curriculum development. By addressing these challenges and embracing opportunities for improvement, maritime education can better equip cadets to navigate the complexities of the global maritime industry. This research serves as a guide towards a more sustainable and harmonious future in maritime education and the maritime industry.
The Development of Mathematics Learning Media Using Google Sites Web Based on an Integrated Contextual Approach to Islamic Values for Junior High School Students in Riau, Indonesia
Authors: Noviarni Noviarni , Ahmadi Arif , Rahmadina Dinda Okta , Mardini Purri , Amelia Rizki
Published: December 2023

This article explains about the development of Google Sites web learning media based on a contextual approach integrated with Islamic values in mathematics material for junior high school or Islamic junior high school (MTs), including number patterns, circles, statistics, the Pythagorean theorem, and building flat-sided spaces, which can facilitate students’ learning. The product developed was tested in Islamic junior high schools or Islamic junior high school (MTs) in the Riau Province regencies, including Pekanbaru, Kampar and Indragiri Hilir, with the schools that have internet access. The research material for the Pekanbaru area is on Circles and Flat-sided Space Buildings, the Kampar area is on Statistics and the Pythagorean Theorem, and the Indragiri Hilir area is on Number Patterns. The data collection techniques used questionnaires and posttest questions with data types in the form of quantitative data and qualitative data. Based on data analysis from the learning media developed for the five materials above, it shows that the Google Sites web learning media based on a contextual approach integrated with Islamic values is in the valid, practical and effective category, where each material tested has an average posttest score for the experimental class which is higher than the average posttest score of the control class.
Integrating Environmental Education into Maritime English Curriculum for Vocational Learners: Challenges and Opportunities
Authors: Rasita Gloria Barus Irma , Bernadtua Simanjuntak Marudut
Published: December 2023

This research delves into the vital intersection of Vocational Education, English for Specific Purposes (ESP), and English as a Second Language (ESL) within the domain of Maritime English. The specific subtheme of the research is “English Maritime - Integrating Environmental Education into Maritime Curriculum: Challenges and Opportunities.” The primary objective is to conduct a descriptive qualitative research analysis of existing literature to support the teaching and guidance of Maritime English, particularly for vocational learners. This research is conducted within the educational setting of the Vocational School at IPB University. In a world where maritime industries play a pivotal role in global trade and environmental consciousness is on the rise, the role of language acquisition, particularly in maritime contexts, is paramount. The integration of environmental education into the Maritime English curriculum presents a unique opportunity to address linguistic complexity, resource development, instructor competence, and time constraints. Simultaneously, it offers enhanced communication skills, global relevance, environmental responsibility, and alignment with industry trends. These findings have substantial implications for curriculum development, instructor training, flexibility, and industry engagement, contributing to more responsible maritime practices.
The Development of a New Task-based Maritime Culture Content Multimedia Textbook for Vocabulary Instruction to Student Ability
Authors: Murni Dewi , Nopita Dewi , Hanifah Hanifah , Nuzulia Rahma
Published: December 2023

It is crucial to understand that the concept that the best content should be accessible to communicative demands in everyday life is strongly emphasized in task-based language instruction (TBLT). In order to provide cohesive, engaging, current, and interesting teaching materials, or at the very least to prepare students for the primary textbook—a multimodal supplement that can include rich content from websites, games, social media, and other sources— research on teaching development is therefore necessary. The goal of this study is to put into practice a task-based, locally-based, multimodal supplemental textbook that is compatible.
PBSI Students’ Competency Using Letters and Punctuation in Writing Research Proposal about Language and Literature Learning based Environment
Authors: Andheska Harry , Suhardi Suhardi , Irawan Dodi , Mustado Maulida , Onyxi Tampubolon Rines , Elfitra Legi , Purnama Sari Cut
Published: December 2023

This article aims to describe the results of research on competency in Ejaan Yang Disempurnakan (EYD) in research proposals for students of Indonesian language and literature education study program (PBSI) class of 2020. Specifically, the objectives are focused on two, namely competency in using letters and competency in using signs. read. This research method is descriptive, involving 80 research subjects. Data analysis was carried out quantitatively by calculating the average and percentage of competency for each student. The results obtained from this research illustrate that students’ competence in using letter spelling is sufficient. Meanwhile, students’ competence in using qualified punctuation marks is lacking. This proves that PBSI students class of 2020 still do not have the skills to apply spelling properly. Suggestions from the results of this research are that supervisors are expected to focus more on checking and reviewing the use of spelling in student research proposals. Apart from that, students need intensive guidance regarding the use of correct spelling in accordance with the spelling rules that apply in Indonesian.
Teachers’ Understanding of Developing Independent Curriculum Teaching Modules for Mathematics Teachers in Middle Schools in Tanjungpinang City
Authors: Yudho Prastowo Aang , Elvi Mariyanti
Published: December 2023

Curriculum changes that are currently occurring are due to the needs and demands that exist in the world. The implementation of an independent curriculum gives teachers more freedom to use a variety of learning tools that are tailored to the needs and interests of their students. The research explores teachers’ Understanding in compiling independent curriculum teaching modules, especially in mathematics learning. This research uses a descriptive quantitative approach with survey methods. This research was carried out in July 2023, with the subject being mathematics teachers at junior high schools in Tanjungpinang City. The data collection used in this research was a questionnaire instrument. The data analysis used in this research is descriptive analysis. The results of research on teachers’ understandings in compiling teaching modules show that 73.3% of teachers already understand the components of teaching modules, 73.3% of teachers can adapt and pay attention to students’ initial abilities, 80% pay attention to learning outcomes, teachers also optimize infrastructure that supports learning. However, teacher understanding needs to be developed, such as model selection understandings, learning strategies and techniques, the concept of meaningfulness, and selecting the right instrument to prepare learning assessments.
Which English accent is better for international maritime communication? A plenary speech at the 2023 International Conference on Maritime Education
Authors: Wei Dai David
Published: December 2023

It is crucial to develop maritime professionals’ command of English since English is used as a shared language (lingua franca) among maritime professionals coming from different language and cultural backgrounds. An interesting question about learning English as a lingua franca is which English accent second-language (L2) English speakers should aspire to. Drawing on previous research and the speaker’s own empirical work Dai and Roever (2019), in this talk I discuss how first-language (L1) and L2 English accents affect listeners’ comprehension, attitude and familiarity with the speakers’ speech. I conclude with implications for English language teaching and learning for maritime professionals who use English as a shared language in international maritime communication.
Synthesis of MIL-100(Fe)@Fe3O4 from Magnetic Zircon Mining Waste Modified by CTAB for Naphthol Dye in Water Removal
Authors: Pereiz Zimon , Pebriyanto Yunus , Naulita Turnip Oktaviani , Maya Sylvani Miranti , Karelius Karelius , Putra Ramdhani Eka , Chuchita Chuchita , Agnestisia Retno , Horale Pasaribu Marvin , Prasetya Toepak Erwin
Published: December 2023

The synthesis of MIL-100(Fe)@Fe3O4 composite modified by CTAB has been reported in this study. This research begins with synthesis of magnetite (Fe3O4), using an iron precursor from zircon mining magnetic waste. The MIL-100(Fe)@Fe3O4 was composited with CTAB using a room-temperature in situ synthesis method. The MIL-100(Fe)@Fe3O4-CTAB composite obtained was then characterized using Fourier Transform Infrared spectroscopy and X-ray diffraction. The synthesized MIL-100(Fe)@Fe3O4-CTAB was then used to adsorb naphthol dye from the aqueous phase. The maximum naphthol removal was obtained at a concentration of CTAB of 0.4 M and pH of 6. The adsorption kinetics showed that the adsorption followed a pseudo second-order kinetics model, with the rate constant values for MIL-100(Fe)@Fe3O4-CTAB being 1,712 x 10-2 g/mg.menit, respectively. The results also showed that the adsorption isotherm of MIL-100(Fe)@Fe3O4-CTAB follows the Langmuir isotherm for adsorption capacities of 63,036 mg/g, respectively. The results indicate that naphthol dye can be effectively removed from the aqueous phase by using the iron content in the magnetic waste from zircon mining, which was used as a precursor for the manufacture of MIL-100(Fe)@Fe3O4-CTAB composite.
Trend ocean literacy research in Indonesia: A bibliometric analysis
Authors: Asikin Nurul , Suwono Hadi , Bambang Sumitro Sutiman , Dharmawan Agus , Qadri Tanjung Annisa
Published: December 2023

Ocean literacy (OL) is crucial in sustainably maintaining and protecting the oceans. The main objective of this research is to present bibliometric data on articles related to OL in Indonesia published in journals indexed in the SINTA database between 2014 and October 2023. Articles collected from 26 articles published within the scope of this research were bibliometrically analyzed based on five categories: 1) number of articles published each year, 2) most frequently used keywords, 3) type of research used, 4) universities or institutions that conduct OL research, and 5) journals that publish OL articles. Bibliometric analysis shows that most articles regarding OL studies were published in 2021 (8 articles). The keywords most frequently used are ocean literacy, literacy, and environmental education. The types of research often used are quantitative research (10 articles) and qualitative research (9 articles). The university with the most OL articles published is Universitas Maritim Raja Ali Haji (UMRAH) (8 articles). This study presents a perspective on OL research in Indonesia that can be used as a reference for researchers, educators, and parties involved in sustainably preserving the ocean in the future.
Comparison of the energy intensity of table apple production in the Czech Republic
Authors: Šánová Petra , Mareš David , Dědina Daniel , Yekimov Sergey , Sharov Sergii
Published: December 2023

The study deals with the issue of energy intensity of domestic (Czech Republic) table apple production in certified and non-certified enterprises in the Czech Republic according to the GLOBALG.A.P. standard. The aim of the study is to find out what are the differences in energy intensity (achieving output through inputs) of certified and non-certified enterprises according to the GLOBALG.A.P. standard. Also, when examining energy relationships, it was concluded that the group of certified producers expend the input energy with greater efficiency and productivity.
The influence of nutrition and various materials on tomato cultivation in hydroponics
Authors: Abdiev Zafarali , Khurramov Ulugbek , Karimov Jamshid , Zokirov Kurbonalijon , Omonov Mamatqobil , Jumanov Laziz , Ruzmetov Ghulam
Published: December 2023

The article presents the results of the research conducted in order to prepare small hydroponics models, trays, hydroponics materials, (gravel, sand, coconut, prilite) drip irrigation and collector equipment, preparation of basic solutions with the participation of various macro and micro fertilizers and their composition. In the determination, indicators of rN, ES, t ºC of the basic solution were constantly studied. Also, the mixing ratio of each basic solution with water (1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1: 9, 1:10) is analyzed. The irrigation and fertilizing tank in the small model hydroponics system has a capacity of 10-20 l, a solution of mineral fertilizers dissolved in water is placed in it, and the solution of fertilizers in it is dripped through the opening and closing valves to the irrigation pipes and mixed with water to the plants. The concentration and consumption of the mineral fertilizer solution was controlled using an electroconductometer device on the water falling from the droppers, and the solution falling from the droppers at the top, middle and lower part of the dropper pipes was determined using measuring cylinders (1 l).
Effect of storage conditions and periods on the quality of watermelon (Citrullus lanatus)
Authors: Zokirov Kurbonalijon , Sullieva Suluv
Published: December 2023

the article presents the results of research on the changes in fruit quality and chemical composition when fruit of watermelon varieties and hybrids are stored in a combined method (in the open field and in a naturally ventilated warehouse). Also in the article, the advantages and disadvantages of this method of storage are explained from a scientific point of view.
Determination of the activity of some antioxidant enzymes during the germination periods of cereals and legumes
Authors: Mirkhamidova P. , Shakhmurova G.
Published: December 2023

As a result of the exchange of substances in a living organism, “products” “free radicals” and peroxide compounds of organic and inorganic substances are formed. It is known that free radicals damage cells. Enzymes of the body's antioxidant defense system, superoxide dismutase, catalase, glutathione reductase, glutathione peroxidases, and toxic products of lipid peroxide oxidation turn free radicals into harmless substances. In this work, the activity of one of such enzymes - peroxidase, catalase was studied. The activity of catalase enzyme during the germination periods of cereal and leguminous plants is different, the highest activity of the catalase enzyme during the germination periods of cereal plants was determined on the 5th day of the germination period: in wheat – 5,644 mg H2O2/g, in barley – 4,08 mg H2O2/g, in oats – 5,134 mg H2O2/g. In leguminous plants, the highest activity was determined on the 3rd day of the germination period: it was 11,832 mg H2O2/g in soybean, and 8,126 mg H2O2/g in mash. The highest activity of peroxidase enzyme is on the first day of wheat and is 1,158 µmol/min.g mass. In leguminous plants, the highest activity of the peroxidase enzyme is on the 9th day of the soybean germination period, and its activity is 0,687 µmol/min.g. constituted the mass.
Increasing by electrophysical methods of fruit and vegetable juice production
Authors: Kurbonov J.M. , Yusupov Sh.J. , Mahmadiyarova Y.N.
Published: December 2023

The article represents the results of research on the increase of fruits and vegetables juice yield by electrophysical methods are presented. Apples from fruits, apricots, plums and carrots from vegetables, Suggestions and recommendations have been made for the extraction of juice in an electroplasmolizer with a combined two-electrode VHF, in all cases to obtain more juice than unprocessed. In the study, the process of electroplasmolysis, the specific electrical conductivity, the effect of temperature on the processing time and the methodology for determining the dielectric constant of processed products and the equipment used are presented. In particular, in the measurement of specific conductivity, a rectangular dielectric working chamber, plate electrodes, laboratory autotransformer connected to them - LATR-1M, laboratory single-phase thyristor power supply (220 V, 50 Gts), sound generator GZ-33, high-frequency machine generator 93 GIM1, from the dielectric slave electric pole and conductors connected to the resistor bridge, the voltage applied to the electrodes during the experiment D-5055 voltmeter, the working current D-5017 ammeter,It also presents the relevance and relevance of the topic, keywords, calculation methods in the experimental process, and the results and discussion of electrical and dielectric conductivity of whole and cut varieties of fruits (apricots, apples, plums) and vegetables (carrots, beets) of different sizes.
Floristic composition of Sukh District of Fergana Region
Authors: Kadirova Khulkaroy
Published: December 2023

The article reviews the research conducted in the Sukh district, which is currently a tourism region of Uzbekistan, the floristic composition of the Sukh district and the types of ephemeral and ephemeroid plants in Sukh district, the list of medicinal plants among them, and the distribution percentage in the district in the section of families are highlighted.At the same time, based on the information provided in the existing herbarium funds and literature, brief information about the composition of the species and its distribution areasand some discussions on carrying out targeted research on ephemeris and ephemeroids distributed in the flora of Sukh district are presented.
Research of ecologically pure electrotechnology in the process of germination of mulberry silkworm eggs
Authors: Yusupov D. , Abdullaev M. , Formonov A. , Atamirzyev T. , Khaitov B.
Published: December 2023

The article presents the results of research and analysis of mulberry silkworm eggs on the treatment of eggs from harmful microorganisms on the basis of pre-incubation treatment with ultraviolet light and electrically activated water, accelerating its growth, increasing resilience during incubation and improving viability.
Issues of improving cotton reform
Authors: Xurramov Azamat , Xushmuradov Oman , Turobov Sherzod , Faxriddinov Bahriddin , Namozov Bekjon
Published: December 2023

In the article, in modern conditions, economic relations between farms specializing in the production of raw cotton and enterprises of the cotton-textile cluster, their obligations and rights, completely new production and marketing relations, measures to organize the principles for the sale of finished products are considered. Cotton products in the domestic and foreign markets. An analysis of the work carried out in the cotton industry of the Kashkadarya region is also presented.
Justification of the parameters of the effective design of the centering tension roller of the conveyor belt
Authors: Dzhuraev Anvar , Davidbaev Baxtiyordjan , Mirzahanov Yunus , Davidbaeva and Nargiza
Published: December 2023

The article provides a structural diagram and principles of operation of the centering tensioning device of the belt conveyor. Based on theoretical research, the parameters of the centering device of the belt conveyor have been substantiated. Production tests substantiated the technical and economic indicators of the belt conveyor with the recommended centering tensioner.
Study of methane oxycondensation reaction (mn2o3)x∙ (na2moo4)y ∙ (zro2)z and textural characteristics of the catalyst
Authors: Fayzullayev Normurot , Tursunova Nargiza , Nazarova Nodira , Rakhmatov Shokir
Published: December 2023

In the study, the effect of temperature, methane: air ratio, specific volume velocity, and various other factors on the yield of target products, methane conversion, and process selectivity of the methane catalytic oxycondensation reaction were studied. The effect of volumetric velocity was studied at a temperature of 800°C and a volumetric ratio of CH4:air = 1:2. The effect of temperature on the oxycondensation reaction of methane was studied in the presence of a catalyst of optimal composition at intervals of 50°C in the range of 600–850°C, at a constant volumetric velocity (1000 h-1) and a ratio of CH4:air = 1:2. CN4: The effect of air ratio was studied at a temperature of 800°C and a volumetric velocity = 1000 h-1. As a result of kinetic studies, an improvement in process performance was observed with increasing contact time and temperature rise. An increase in the CH4:O2 ratio leads to a decrease in methane and oxygen conversion. The addition of ethane, ethylene, СО, and СО2 to the reactor has been shown to reduce the formation of products. The work aims to study the kinetic laws of the reaction of oxidation of methane in a catalyst containing (Mn2O3)x·(Na2MoO4)y ·(ZrO2)z and to evaluate the texture characteristics of the catalyst.
Development of irrigation and hydrography networks of the Fergana region on the basis of GIS technologies, the content of the Elektron digital card
Authors: Safarov Eshkabul , Mamanazarova Dilobar
Published: December 2023

In this article, on the basis of the creation, grouping and classification of the database in the ArcGIS program, the content of the elekrton digital card based on the cartographic basis, design and methodology of irrigation and hydrography networks of the Fergana region and irrigation networks in the region for territorial organization was developed. Irrigation network data has been collected and processed using modern computer, geoengineering, and Internet technologies. Comprehensive analysis of data from large-time, large-scale and natural water networks has made it possible not only to represent on the card the digital characteristics of irrigation and melioration networks, which are necessary for more objective assessment and practical use of the economic processes of irrigation systems. Methods for converting irrigation network data to digital format have been developed, attribute data structures are formed that provide a unified cartographic space of the territory, complex irrigation networks are fundamental steps in creating models (algorithms) for using data in research. Creation of an irrigation card at the regional level. based on existing irrigation and melioration concepts and modern technological advances, methods for creating a digital card have been developed.
Study of regulatory conditions for electrochemical water purification and the composition of microelements in it
Authors: Zakirov Karimjon , Abdullaev Murodjon
Published: December 2023

The research consists of selecting the most optimal water sample for the purpose of electrochemical activation of water and the composition of microelements in it, electrochemical activation of the selected sample, as well as studying the effect of pre-sowing treatment of melons with microelements of various concentrations on their germination in laboratory conditions.
Determining the dirt capacity of loading pressure water treatment filters with an upward flow of purified water
Authors: Negmatov Mirzabaxrom , Akhunov Doniyor , Tolipov Muzaffar
Published: December 2023

One of the main and important technological characteristics of filter units is dirt holding capacity, the value of which determines the required frequency of the filter’s inter-flushing period. The object of this study is a vertical pressure filter with an upward flow of purified water and a clamped filter layer. The research methods used include analysis of literary sources on the topic under study, experimental studies to measure the quality of source water entering the filter, particle size distribution, filtration speed, pressure loss in the filter load and the nature of the distribution in the filter layer of the load. The study of the dirt holding capacity of the load by its height, the ultimate goal was to determine the nature of the distribution of contaminants along the height of the load, depending on the given particle size distribution under conditions of ultra-high-speed filtration with a constant speed and the movement of water from bottom to top in the direction of decreasing size grain loading. According to the results of studies based on data collected over a one-year period, it is shown that the retained contaminants along the height of the filter load are distributed unevenly; the largest amount of contaminants is retained in the lower layers of the load and as the distance from the lower boundary of the filter load increases, the content of extracted suspended substances in it gradually decreases, and conclusions are also given that, other things being equal (the same particle size distribution and height of the load, the content of suspended substances in source water), the dirt holding capacity of the filter during ultra-high-speed filtration with an upward flow is two and a half times higher than the dirt holding capacity during filtration with a downward flow, and one and a half times higher than the dirt holding capacity during filtration with an upward flow and a constant filtration speed.
Assessment of the effect of evaporation on the hydrological regime of the water reservoir
Authors: Samiev Luqmon , Ulashov Qudratilla , Gaffarova Mushtariybonu , Ruziev Dilmurod , Voxidova Umida
Published: December 2023

During the review of the effect of evaporation on the change of the hydrological regime of water reservoirs, an analysis was carried out on how global climate change will lead to a change in the water reservoir regime. Taking into account the sudden increase in air temperature and the effect of wind, the evaporation process in the month of June (June) was studied simultaneously during the years 2018 and 2022. During the research period, the effect of evaporation on the change of the hydrological regime of the water reservoir was determined by empirical formulas proposed by scientists such as B. D. Zaykov, A. Z. Braslavsky and P. A. Vikulina, and it was observed that the evaporation process is increasing year by year. According to accurate calculation books, the evaporation in June 2018 at the same time E0=86.14 mm, Ev=108.16 mm, in June 2022 this figure is E0=121.27 mm, Ev=166.35 mm was found to be organizing. According to the analysis, we can see that the evaporation process in the reservoirs is increasing year by year, which causes a change in the hydrological regime of the reservoirs. The evaporation process is mainly caused by the increase in air temperature, the influence of the wind, and the fact that the surface of the reservoir is at its maximum level in May and June.
Water purification and demineralization technology
Authors: Аbdullауеv Muxаmmаdаli , Jurаеv Shеrаli , Yоqubjаnоvа Yоqutxоn , Аkrаmоv Аxrоr
Published: December 2023

Thе pаpеr hаs invеstigаtеd flоссulаtiоn саpасitу оf pоlуhеxаmеthуlеnе guаnidinе hуdrосhlоridе during jоint trеаtmеnt with аluminum sulfаtе оf thе Nаrin аnd Sirdаrуа Rivеr wаtеr in thе spring pеriоd. It hаs bееn shоwn thаt аdditivеs 1–5 mg/dm3 оf thе mаttеr undеr studу during соаgulаtiоn trеаt-mеnt оf thе rivеr wаtеrs imprоvеs thе prосеss оf thеir сlаrifiсаtiоn, inсrеаsеs thе filtrаtе quаlitу in tеrms оf mаin indiсаtоrs аnd mаkеs it pоssiblе tо rеduсе bу 10–20 mg/dm3thе dоsе оf thе соаgulаnt. А prоnоunсеd flоссulаtiоn еffесt mаnifеsts itsеlf whеn trеаting thе wаtеrs in quеstiоn bу thе dоsеs оf а pоlуmеr prеpаrаtiоn rеspесtivеlу 3–5 аnd 2–3 mg/dm3. Pоlуhеxаmеthуlеnе guаnidinе (withоut а соаgulаnt) еnsurеs а stаndаrdizеd quаlitу оf thе filtrаtе in tеrms оf соlоr аnd turbiditу оnlу whеn trеаting wеаklу stаinеd wаtеr оf thе Sirdаrуа Rivеr. It hаs bееn fоund thаt ≥ 99% оf pоlуhеxаmеthуlеnе guаnidinе is rеtаinеd bу thе mеdium оf а sаnd filtеr.