Plant Production Process Research Articles

Spatial distribution, source apportionment, and risk assessment of perfluoroalkyl substances in urban soils of a typical densely urbanized and industrialized city, Northeast China

As an important capital city of intensive urbanization and industrialization in Northeast China, Changchun has experienced extremely rapid development, with diverse sectors such as automobile manufacturing, equipment manufacturing, optoelectronics, and pharmaceutical decoration. However, data on the levels and profiles of perfluoroalkyl substances (PFASs) in urban soils of Changchun is limited. This study investigated 17 PFASs across various functional zones within the main urban area of Changchun. ∑PFAS concentrations in the soils ranged from 0.236 to 6.483 ng/g, averaging 1.820 ng/g. Perfluorocarboxylic acids (PFCAs) were more prevalent than perfluorosulfonic acids (PFSAs), and short-chain PFASs (C ≤ 6) were the predominant residues. PFAS concentrations varied across functional zones, with commercial markets exhibiting the highest levels, followed by industrial areas, residential areas, suburban zones, and transportation areas. Molecular diagnostic ratio and PCA-MLR analysis identified industrial production processes of consumer goods and wastewater treatment plants as the primary sources of soil PFAS contamination. There were no obvious health risks of soil ∑PFASs, while soil PFOS and PFHxS may have an impact on the richness and diversity of soil microbial communities in some certain locations. This study provides new data on PFAS residues in soils influenced by diverse contamination sources within a key industrial city in Northeast China, offering valuable insights for prioritizing remediation and restoration efforts.

Influence of Selenium on the Yield and Content of the Amino Acid Composition of Spring Wheat Grain under Optimal Conditions of Water Supply and during Drought

In model experiments in soil culture, the effect of various methods of applying sodium selenite on the formation of yield and amino acid composition of grain varieties of spring wheat Zlata and Ester, depending on water supply conditions, was studied. Sodium selenite was introduced by pre-sowing seed treatment and leaf treatment of vegetative plants. The study simulated optimal water supply conditions and soil moisture deficiency during the critical period of plant growth. The role of selenium in the regulation of the production process and the formation of the amino acid composition of spring wheat grain was studied. It was found that the production process of wheat plants, both under optimal water supply and in drought conditions, depended on the method of application of selenium and the varietal characteristics of spring wheat. The results allowed us to assume that selenium activated the attenuating ability of the ear by enhancing its acceptor properties. Under these conditions, the grains were better provided with assimilates. this made it possible to form the maximum possible yield of wheat grain. In conditions of drought, during leaf treatment of plants with sodium selenite, favorable conditions were created for the formation of reproductive organs of wheat, which stimulated the restoration of the processes of assimilate outflow from the vegetative mass into the forming grains. This made it possible to influence production processes and reduce the depression of wheat crop formation. The use of selenium revealed an increase in the total content of key amino acids, which had a significant effect on the antioxidant status of plants and contributed to the realization of their adaptive potential. The positive effect of selenium on the content of a number of amino acids, including on the assimilation of methionine, was revealed, which was probably due to the synthesis of selenomethionine, since the ways of their formation are similar and it is not possible to separate them. The greatest effect of selenium was observed in the cultivation of wheat of the Zlata variety compared with wheat of the Ester variety, which was determined by varietal differences inherent genetically and the unequal protein content in the grain.

Conceptual Approaches to the Development of Nature-like Technologies Which Prevent the Degradation of Agricultural Lands

The author presents the results of the study and substantiation of conceptual approaches and physical principles that are necessary and appropriate in the development of nature-like technological processes, technical systems and means that are fundamentally different from the most common and currently used. The proposed approaches are based on modern ideas about the physiology and production processes of plants. Based on the concept of symbiosis of plants and soil microorganisms, creating optimal conditions for the preservation and development of biocenoses formed in root-inhabited soil layers through intrasoil cultivation.

Legal Cooperation of Kazakhstan with the BRICS Countries on the Production and Operation of Medical Electric Vehicles with Artificial Intelligence Technologies

This scientific article is devoted to the study and analysis of legal relations between the Republic of Kazakhstan and the BRICS countries in the field of the production and operation of medical electric vehicles with artificial intelligence technologies. Particular attention is paid to legislative measures that promote the formation and development of a new industrial sector, such as the production of medical electric vehicles with artificial intelligence technologies. The research uses a number of methods, including studying empirical data, comparative legal analysis, synthesis, generalization, and scientific forecasting. The article proposes legislative measures to solve the problems facing the medical electrical machinebuilding industry and the unmanned medical electric vehicle industry, as well as the difficulties of integrating automation and digitalization into the production process of transportation plants in Kazakhstan and the BRICS countries. In the order of forecasting, the authors propose the adoption of several laws that are relevant to the issue under consideration. These proposals include the signing of new international cooperation agreements between Kazakhstan and the BRICS countries aimed at the introduction of digitalization at machine-building plants in Kazakhstan for the production of medical electric vehicles equipped with artificial intelligence technologies.

MEMBANGUN BISNIS TANAMAN HIAS INDOOR DI KOTA KUPANG MELALUI KEGIATAN KEWIRAUSAHAAN MAHASISWA PROGRAM STUDI AGRIBISNIS FAKULTAS PERTANIAN UNIVERSITAS NUSA CENDANA

The indoor ornamental plant business in Kupang City is quite a promising business. The survey results provide an indication that the demand for indoor ornamental plants continues to grow. This provides a promising business opportunity if pursued professionally and strategically so that it can generate profits. The target market for this business is the people of Kupang City who need indoor ornamental plants, such as offices, lecture halls, residential houses, shady places, etc. The choice of types of indoor ornamental plants in this business are leaf ornamental plants and flower ornamental plants, with good quality provisions, regular maintenance and fertile, quality soil. The objectives of this activity are (1) Building students' entrepreneurial interest in the field of indoor ornamental plants; (2) Channeling your interest or hobby in ornamental plants; (3) Increase and popularize interest in ornamental plants among the people of Kupang City. The method used in this activity is direct student participation in the production and marketing process of indoor ornamental plants. As a result of this activity, the students involved were motivated to produce and pursue indoor ornamental plant business.

The factors affecting the development of medicinal plants from a value chain perspective.

From a value chain perspective, this paper examines the important factors from the selection of planting areas to storage, which restrict the development of medicinal plants. The purpose of this paper is to provide theoretical basis for the sustainable development of medicinal plants. Medicinal plants have significant economic and medicinal value. Due to the gradual depletion of wild medicinal plant resources, cultivators of medicinal plants must resort to artificial cultivation to cope. However, there are still many problems in the production process of medicinal plants, resulting in decreases in both yield and quality, thus hindering sustainable development. To date, research on the value chain of medicinal plants is still limited. Therefore, this paper analyzes the factors affecting the development of medicinal plants from the perspective of the value chain, including the selection of growing areas to the storage process of medicinal plants, and summarizes the challenges faced in the production process of medicinal plants. The purpose of this paper is to provide theoretical basis for the sustainable development of medicinal plants.

Response of cotton growth, yield, and water and nitrogen use efficiency to nitrogen application rate and ionized brackish water irrigation under film-mulched drip fertigation.

The presence of brackish water resources is significant in addressing the scarcity of freshwater resources, particularly in the Xinjiang region. Studies focused on reducing adverse effect of brackish water irrigation based on using ionized brackish water, as well as on investigating its effects on fibre and oil plant production processes, remain incipient in the literature. Some benefits of this technique are the optimization of the quality and quantity of irrigation water, economy of water absorbed by the plants, improvement in the vegetative growth and productivity compared to irrigation using conventional brackish water. Thus, the aim of the current study is to assess the effect of different nitrogen application rates on soil water and salinity, cotton growth and water and nitrogen use efficiency. The experimental design consisted of completely randomized design with two water types (ionized and non-ionized) and six nitrogen application rates with four replications. Irrigation conducted with ionized brackish water and different nitrogen application rates had significant effect on the plant height, leaf area index, shoot dry matter, boll number per plant and chlorophyll content. The study also demonstrated significant effects of ionized brackish water on soil water content and soil salinity accumulation. The highest cotton production was achieved with the use of 350 kg·ha-1 of ionized brackish water for irrigation, resulting in an average increase of 11.5% compared to the use of non-ionized brackish water. The nitrogen application exhibits a quadratic relationship with nitrogen agronomic use efficiency and apparent nitrogen use efficiency, while it shows a liner relationship with nitrogen physiological use efficiency and nitrogen partial productivity. After taking into account soil salinity, cotton yield, water and nitrogen use efficiency, the optimal nitrogen application rate for ionized brackish water was determined to be 300 kg·ha-1. It is hoped that this study can contribute to improving water management, reducing the environmental impact without implying great costs for the producer.

Distribution ofListeria spp., andListeria monocytogenesin micro- and small-scale meat product processing plants

Listeriosis is a disease caused by L. monocytogenes, a relevant microorganism as a causative agent of foodborne diseases - FBD. This study aimed to evaluate the distribution of Listeria spp., and L. monocytogenes in different production areas in two small plants (A and B) and two micro-food processing plants (C and D) producing meat derivatives, located in different cities of Colombia. The methodology implemented was i. The analysis of sampling points is based on a harmonised tool. ii. Four samplings in each production plant between 2019 and 2020. iii. Isolation and identification of microorganisms through conventional microbiology, a semi-automated system, molecular serotyping and clonal characterisation by ERIC-PCR. L. monocytogenes frequency in the production plants belonging to the study ranged between 5.9 and 28.6 %; for Listeria spp., plants A and D had isolated, plant A had the highest proportion, while for L. monocytogenes geno-serotypes found were: 1/2a, 1/2c, 4a-4c, 4b, 4d - 4e, with geno-serotype 4b as the most frequent. Furthermore, possible persistent isolates were detected in plant C as the feasible sources of contamination, based on failures in flow management, raw material contaminated with L. monocytogenes, lack of standardised cooking processes and transfer of the microorganism through equipment and surfaces. Finally, in three of the four production plants assayed, L. monocytogenes or Listeria spp. were present in the packaging area in some of the samples taken during the study, which calls for increased and frequent monitoring, as well as constant technical support for the control of L. monocytogenes in micro and small-scale production plants.

A Low-Carbon Optimal Operation Method for an Industrial Park Multi-Energy Coupling System Utilizing By-Product Hydrogen

To enhance the utilization efficiency of by-product hydrogen and decrease the power supply expenses of industrial parks, local utilization of by-product hydrogen plays a crucial role. However, the methods of utilizing by-product hydrogen in industrial parks are relatively limited. In response to this issue, an optimization method for a multi-energy system with by-product hydrogen considering the production process of chlor-alkali plants was proposed in this paper. Firstly, on the source side, models were established for hydrogen production using the ion exchange membrane electrolyzer and for the energy consumption during the caustic soda solution evaporation process. Secondly, on the load side, this paper explored the potential for local utilization of by-product hydrogen, including its participation in the production of downstream chemical products, combustion when mixed with natural gas, and utilization in hydrogen fuel cells. Next, this paper considered the influence of correlations among various loads within the factory and wind power generation, proposing a method for generating scenarios that takes into account the spatiotemporal correlation of source-load variables. Then, aiming to minimize the system operation cost and carbon trading cost, an operation strategy for a multi-energy system in a low-carbon industrial park, considering local utilization of by-product hydrogen, was proposed. Finally, the effectiveness of the scenario generation method proposed in this paper, considering spatiotemporal correlation, and the economic and environmental benefits of the proposed operation model utilizing the by-product hydrogen are verified through arithmetic simulation, based on the operation data of a chlor-alkali chemical park.

Thermal Energy-Kinetic Energy Conversion Efficiency Analysis Method Based on Grey Cluster Analysis

At this stage, although thermal power generation is still the main method of power generation in my country’s power plants, due to more and more energy consumption, the reserves of resources are gradually beginning to be stretched. Application in the power generation and production process of thermal power plants has become a road that more and more power plants must explore for development. In this paper, through the grey cluster analysis, the power plant can fully improve the power generation efficiency of the power plant in the process of utilizing the existing energy, so as to achieve the purpose of energy saving and environmental protection. Combined with the connotation of thermal energy-kinetic energy conversion, this paper establishes a theoretical framework for the analysis method of thermal energy-kinetic energy conversion efficiency based on grey cluster analysis. On the basis of theoretical research, using descriptive statistical tools, the main performance of thermal energy-kinetic energy conversion to promote economic growth is summarized. The realization method of gray cluster analysis theory is to identify and process the external features of gray information, capture effective information, and quantify the features (ie, whitening process), so as to complete the evaluation or decision-making, and verify the effect of these five mechanisms on economic growth. The final results of the study show that when K=1, 2, 3 and 4, the proportion of heat transfer is 41.63%, 42.19%, 49.63% and 52.13%, and the proportion of heat convection is 37.56% and 41.33%, respectively., 29.69% and 26.78%, the heat transfer and heat convection have the greatest influence on the thermal energy-kinetic energy conversion efficiency.

Valorization of Pine Cones (Pinus nigras) for Industrial Wastewater Treatment and Crystal Violet Removal: A Sustainable Approach Based on Bio-Coagulants and a Bio-Adsorbent

Pine cones are a widely available and abundant natural resource in Algeria, and they are rich in active molecules. This study investigated the valorization of Pine cones as a natural and abundant bio-coagulant in raw form (powder) and extract form. The active components of the Pine cones were extracted using two solvents, distilled water (DW) and NaCl, to obtain coagulants (proteins, polyphenols, and carbohydrates) for the treatment and improvement of industrial water quality parameters (discharge from a processing plant and tomato production) and an adsorbent (residue extract, RE). The recovered bio-coagulant was used to remove turbidity, chemical oxygen demand (COD), and zeta potential. The formed adsorbent was used to remove crystal violet (CV). Coagulation-flocculation experiments were carried out in a jar test to evaluate the performance of the coagulant in powder and extract form. The use of pine cone powder (PCP), extract using NaCl (PC-NaCl), and extract using DW (PC-DW) resulted in turbidity reductions of 96%, 94%, and 98%, respectively. For the residue recovered after extraction, a CV removal percentage of 99.9% was achieved at the optimal conditions of pH 10, CV concentration of 20 mg/L, adsorbent dose of 20 mg/L, and contact time of 120 min, as determined using the Box–Behnken design (BBD). Furthermore, all the effects were significant in the process of the CV phase adsorption on the bio-adsorbent. The model designed for optimal design fit the experimental data well, with a coefficient of determination, R2, of 0.965 and an Adj-R2 of 0.926. The p-value of this model was 0.000, which indicated that the model was very significant. This confirmed the effectiveness of the bio-adsorbent in removing dyes from water.

Direct method of transpiration control in plant production processes

Direct method of transpiration control in plant production processes

Cultivo do meloeiro amarelo submetido a diferentes lâminas de irrigação e aplicação do bioestimulante arbolina

ABSTRACT The objective was to evaluate the physiological and biochemical characteristics during flowering, and the total and marketable fruit yield of yellow melon subjected to different irrigation depths and application of the biostimulant Arbolina®. The experimental design was randomized blocks, in a 2×2×5 factorial arrangement of split-split plots, with four replicates. Plots consisted of 2 forms of biostimulant application (fertigation and spraying), subplots consisted of 2 irrigation depths (40% and 100% of crop evapotranspiration - ETc) and sub-subplots consisted of 5 doses of the biostimulant Arbolina® (0; 0.1; 0.2; 0.4; and 0.8 L ha-1). Melon seedlings were transplanted into the soil at a spacing of 2.0 × 0.3 m, with drip irrigation. Basal and topdressing fertilization was performed via fertigation. The variables evaluated were: for total yield and marketable yield, photosynthetic rate, stomatal conductance, internal CO2 concentration, transpiration and leaf temperature, chlorophyll a and b contents, water use efficiency and relative water content. The biostimulant application by spraying had a better effect on the production process of yellow melon plants, promoting better metabolic efficiency in organ-forming cells, including the process of morphological formation and biochemical constitution of the fruits. It is recommended to use of the biostimulant doses of 0.446 and 0.443 L ha-1 combined with the use of 100% of ETc to achieve the highest total and marketable productivity.

FEATURES OF THE MANIFESTATION OF BIOMETRIC INDICATORS IN VARIETIES AND BREEDING LINES OF WINTER BREAD WHEAT AT SPRING RENEWAL OF VEGETATION DATE IN THE FOREST STEPPE OF UKRAINE

The growth, development, and yield formation of winter bread wheat depends on renewal of vegetation date (RVD). This is one of the environmental factors most affecting the production process of plants. Purpose. To identify the peculiarities of the manifestation of biometric indicators in the genotypes of winter bread wheat at renewal of spring vegetation date in the conditions of the central Forest-Steppe of Ukraine. Methods: field, laboratory, statistical. Results. It was established that biocenosis formation of winter wheat at renewal of spring vegetation date significantly depended on growing conditions, sowing date, genotype and their interaction. Weather conditions were the dominant (25.2÷69.5%) significant for the influence. It was determined that after renewal of spring vegetation the influence of genotype (its ability to intensive growth and adequate response to changes in environmental conditions) and its interaction with the growing season conditions on all biometric indicators significantly increased. It was noted that under favorable hydrothermal regime, the level of realization of plant potential was maximum, while under conditions of soil and air drought it was minimum. This must be taken into account in breeding process, study of the source material, and selection of genotypes with specified parameters. The breeding line LUT 55198 had the highest biomass on average according to the experiment, which at the RVD formed phytocenosis with stem number per plant 2.60 pcs, leaf number per plant 7.74 pcs, plant height 16.51 cm, and plant weight 0.80 g. The level of variability in plant height was moderate (Cv = 14.08%) and for leave number, stem number, and plant weight it was significant (Cv = 18.39%; Cv = 21.54% and Cv = 29.89%, respectively).

Improving the Life Skills of Aisyiyah Members in Mergangsan District through Ginger Candy Training

Ginger is one of the spices that is widely known by the public. Apart from producing flavor in various food products, ginger is known to be rich in properties and easy to cultivate. Efforts to increase the ability of the post-COVID-19 community to increase income by utilizing the yard for planting ginger and other spices have not been maximized due to a lack of public knowledge about processing plant products. Branches in the Mergangsan PCA environment have a great opportunity to contribute to improving the life skills of Aisyiyah branch mothers to process ginger from their yards into products of economic value. The results of the activity showed that there was an increase in the knowledge and insight of women members of Aisyiyah in the Mergangsan District regarding the processing of plant products. The high level of participation and seriousness of Aisyiyah mothers, or 92%, helped to increase the knowledge of Aisyiyah women's members by 96%. Candy products made by trainees have aromas, tastes, and textures that are as expected. Based on monitoring results, as many as 70% of participants after attending the training had tried processing ginger into candy. This indicates that training has high effectiveness and can become an embryo for productive household-scale businesses

HELIUM MARKET AND PROBLEMS OF EASTERN SIBERIA

Helium is a non-renewable natural resource that can act as an indicator of the development of innovation and economy in the countries of the world. In recent years, there have been significant changes in the global helium market: the 10 largest operators occupy up to 87.85 % of the global market. At the same time, their interests are primarily aimed at building new distribution centers and partnerships with owners of helium reserves.In Eastern Siberia, two large helium plants have been built at the Amur Gas Processing Plant and at the gas chemical project of Irkutsk Oil Company LLC, which is an example of a model for combining helium production and gas processing plants. At the same time, the strategic storage of helium is an important infrastructural nature and allows accumulating surpluses or, conversely, if necessary, covering peaks in demand or creating an excess of supply in the struggle for new sales markets.However, due to a complex of problems, these plants have not yet reached the industrial level. First of all, this is due to the refusal of foreign technology suppliers to cooperate in the conditions of sanctions. Only reliance on domestic technologies and equipment for the extraction, purification and liquefaction of helium can change the situation. At the same time, the level of manufacturers technological readiness of equipment manufactured in Russia, in general, allows to provide projects with critical and key equipment.A helium extraction facility is also being built in Yakutia by the Helium 24 Group of companies. The complex will be located on the Mirninsky district territory of the Republic of Sakha (Yakutia). It should be noted that for the project in Yakutia, natural gas with the highest helium content is used as a raw material in comparison with other projects in the Russian Federation.Large reserves and resources of hydrocarbons, combined with the territorial remoteness of the fields of Eastern Siberia, require significant investments for their development and involvement in operation.

Species-specific effects of production practices on genetic diversity in plant reintroduction programs.

Plant production practices can influence the genetic diversity of cultivated plant materials and, ultimately, their potential to adapt to a reintroduction site. A common step in the plant production process is the application of seed pretreatment to alleviate physiological seed dormancy and successfully germinate seeds. In production settings, the seeds that germinate more rapidly may be favored in order to fill plant quotas. In this study, we investigated how the application of cold-moist stratification treatments with different durations can lead to differences in the genetic diversity of the propagated plant materials. Specifically, we exposed seeds of three Viola species to two different cold stratification durations, and then we analyzed the genetic diversity of the resulting subpopulations through double-digestion restriction site-associated sequencing (ddRADseq). Our results show that, in two out of three species, utilizing a short stratification period will decrease the genetic diversity of neutral and expressed loci, likely due to the imposition of a genetic bottleneck and artificial selection. We conclude that, in some species, the use of minimal stratification practices in production may jeopardize the adaptive potential and long-term persistence of reintroduced populations and suggest that practitioners carefully consider the evolutionary implications of their production protocols. We highlight the need to consider the germination ecology of target species when selecting the length of dormancy-breaking pretreatments.

Magnetically treated water affects Melissa officinalis L growth, nutritional status and essential oil compounds

Drip irrigation is one of the agricultural techniques mostly used to grow a wide variety of vegetable crops. Studies focused on improving this technique based on using magnetized water, as well as on investigating its effects on medicinal plant production processes, remain incipient in the literature. Some benefits of this technique are the optimization of the quality and quantity of irrigation water, economy of the water absorbed by the plants, improvement in the vegetative growth and productivity, reduction of the use of fertilizers and the greater availability of nutrients in the soil for crops compared to irrigation using conventional water. Thus, the aim of the current study is to assess the effect of different magnetized and non-magnetized water irrigation levels on Melissa officinalis growth, nutritional status and essential oil compounds in plants grown in protected environment. The experimental design consisted of completely randomized design with two water types (magnetized and non-magnetized) and four irrigation levels (25%, 75%, 100% and 125% of crop evapotranspiration - ETc) with four replications. Irrigation conducted with different magnetized water levels had significant effect on the accumulation of nitrogen, phosphorus, sulfur, and of all micronutrients in plants’ leaves, and on soluble protein contents. The study also demonstrated significant effects of magnetically treated irrigation water on major chemical compounds such as citral (neral + geranial) and citronellal on the leaves of lemon balm plants. Different water levels significantly affected plant dry weight production parameters. In this study it was shown that the plant treated with magnetized water required less amount of water applied being a promising potential in saving water resources that will be of significant importance in the future. Overall, the results need to be further tested under field conditions to assess the usefulness of magnetic irrigation water treatment.in cultivation with medicinal, aromatic and spice plants. It is hoped that this study can contribute to improving water management, reducing the environmental impact without implying great costs for the producer.

Большие данные как продукт обогатительной фабрики: реальность и перспективы на примере угля

The article examines the current and future flow of preparation's plant production processes and how they contribute to the generation of Big Data. It is shown that as the level of automation in the plant increases, the data produced becomes more extensive and varied. At the same time, it is possible to achieve a level when the generated information flows meet the criteria of the Big Data. As a basic example, a typical coal processing plant is used. The main sources, volumes, variety and speeds of data transfer to the processing plant are described and analyzed.

Особенности формирования саженцев малины при капельном орошении в условиях дерново-подзолистых почв Центрального Нечерноземья

Practically no studies on drip irrigation of raspberries in the conditions of the Moscow region have been carried out, in particular, the patterns of the production process of plants under drip irrigation have not been identified. In this regard, the purpose of the research was to study the effect of drip irrigation regimes on the formation of raspberry seedlings in the conditions of soddy-podzolic soils in the Central region of the Non-Chernozem zone of Russia. The studies were carried out on the lands of the educational and experimental farm of the laboratory of fruit growing "Michurinskiy Sad" of the Russian State Agrarian University - Moscow Timiryazev Agricultural Academy in 2020-2022. The two-factor field experience included regimes as the first factor, and varietal characteristics as the second. As a result of the research, it was revealed that drip irrigation contributes to the saving of irrigation water and the creation of an optimal water-air regime of the soil during the entire growing season. In the variant of drip irrigation with maintaining moisture in the root layer in the range of 80-100% of the lowest moisture capacity, the saving of irrigation water compared to furrow irrigation averaged 65%, and in the variant of 60-80% of the lowest moisture capacity - 78%. Drip irrigation contributes to the formation of seedlings with the highest values of biometric indicators (stem diameter, plant height, leaf surface area and volume, length, mass of the root system) and increase productivity. An analysis of the experimental data on the biometric indicators of raspberries and its yield allows us to recommend irrigation regimes with maintaining the moisture content of the root layer of the soil in the range of 70-90% of the lowest moisture capacity and 80-100% of the lowest moisture capacity as optimal.