Effectiveness of biologization predecessors and methods in increasing grain crops productivity and field crop rotations productivity in Nizhneje Povolzhje region

Researches on the study of predecessors and biologization techniques in field crop rotations were carried out in 2018-2020 in the dry steppe zone of the chestnut subzone of light chestnut soils of the Nizhneje Povolzhje region. It is necessary to grow biennial melilot for green manure as a fallow-growing crop in a grain-steam five-field crop rotation in order to increase the organic matter input into the soil. A significant increase in yield was achieved in chickpeas for winter wheat, its straw was plowed into the soil. The highest increase in the spring barley yield was provided during the chickpeas and sorghum cultivation, which straw entered the soil. When growing spring barley on safflower, its straw was plowed into the soil, the yield was also higher than the control variant. The highest grain yield was achieved in the control grain-fallow four-field crop rotation with complete fallow, where the cultivated crops straw was removed from the field and grain-fallow-grass green manure seven-field crop rotation with seed fallow, where straw and melilot were plowed into the soil. Grain-fallow seven-field and grain-fallow-grass-cultivated green manure seven-field crop rotations, where oats and phacelia straw and green manure mass entered the soil, were inferior to the control.

Influence of systems of basic tillage and fertilization with the use of by-products on weediness of crops in crop rotation

The results of research on the study of the influence of soil processing systems and fertilizer using co-product for sown clogs and the yield of agricultural plants in a short-growing crop rotation are given. The influence of soil processing systems and fertilizer using co-products for sown clogs and the yield of agricultural plants in a short-live crop rotation is investigated. It has been established that on dark gray soil use in crop rotation of unifituted soil treatment systems contributes to an increase in the level of sown clogging (barley of the corn on grain at 1.4–1.6, wheat winter of winter of winter in 1.4–1.8 times) Due to the accumulation of the main amount of weed seeds in the upper soil layer. The system of fertilizer with by-products at the beginning of the vegetation of plants stimulates the germination of weeds. On average, over the years of research, the abundance of weeds in cropping crops at the beginning of vegetation when using unifituted soil treatment systems was 213–362 pcs/m2, dismissal – 94–108 pcs/m2, and before harvesting was noted a decrease in clogging, respectively, 29–57 pcs/m2, 10–13 pcs/m2. The air-dry weight of the weeds of the highest was with surface soil processing using co-product fertilizer (81.3–85.4 g/m2) relatively with dumping soil treatment (21.7–23.3 g/m2). The highest grain grain of wheat winter – 6.91 and 6.50, corn – 11.47 and 11.74, barley of the yarn – 5.37 and 5.13 and the rape of winter – 3.08 and 3.19 t/ha received when Discalled by 20–22 cm and shallow 10–12 cm soil processing system. With a 6–8 cm surface, the yields of crops decreased by 1.45, 3.66, 1.69 and 0.31 t/ha correspond to plants. A significant reason for reducing plant yields in versions with unifituted soil treatment systems served as a clogging factor, because the level here was higher than when the soil processing.

TARGETED APPROACH TO COST CLASSIFICATION IN THE CROP INDUSTRY: PLANNING, MANAGEMENT AND CONTROL

One of the most important management aspects of cost accounting is their classification. It is for the correct organization of cost accounting production in accordance with their features, composition and value in production process, as well as for the needs of control, analysis, calculation cost and cost management are divided into groups on the basis of which are determined by the purpose of classification or the target approach. The issue of classification of production costs in economics has long been given considerable attention. However, a single classification of costs that would satisfy all researchers and practitioners has not yet been developed. Most domestic and foreign scientists consider the classification of costs, taking into account the economic processes of industrial enterprises, ignoring agriculture, which has specific features. The article is devoted to the study of the target (functional) approach to the classification of production costs, in particular in the aspect of planning, management, control and regulation, taking into accounts the peculiarities of growing crop products. The dependence and influence of technological features of crop production on the size and behavior of costs when grouped into variables and constants are studied. The study concluded that, taking into account the technological features of growing crop products, costs during the growing season of crop production are determined by the cultivated area under a particular crop, and during harvesting and primary processing – the volume of production of a particular product. The importance of taking into account the concept of “responsibility centers” in the control and regulation of costs, the importance of separating this concept from the concept of the place of origin of costs within the objectives, coverage and responsibility. Examples of the distinction between cost centers and centers of responsibility in the field of crop production are given. The expediency of the budgeting process and its role in grouping costs into planned and unscheduled are considered. The importance of accounting and grouping of costs for productive and unproductive costs in crop production is proposed.

Torrefaction as a Pretreatment Technology for Chlorine Elimination from Biomass: A Case Study Using Eucalyptus globulus Labill

The recognition of the effects of fossil fuel consumption resulted in several agreements, legislation, and projects focusing on the minimization of impacts caused. Biomass is a versatile energy source. Eucalyptus is a fast-growing crop, mainly used by the pulp and paper industry. Torrefaction is a thermochemical conversion process that can improve biomass fuel properties, enabling its use in the energy sector. However, correct management of biomass is crucial for the sustainability of this process. Torrefaction can also be used to eliminate some elements that can hinder subsequent conversion processes. One example is chlorine, which, during combustion or gasification processes, can form hydrochloric acid that leads to corrosion of metal surfaces. In this context, this research aimed to determine the temperature at which chlorine is eliminated during torrefaction process. For this purpose, several tests were performed at different temperatures and residence times. All samples were analyzed before and after the process, and were characterized by proximate and elemental analysis, calorimetry, and chlorine titration. The analysis showed that, even for the lowest torrefaction temperature used, chlorine content was already below the detection value, showing that, even at lower temperatures, thermal treatment is an efficient technique for the elimination of chlorine from biomass.

Yield gap, profitability and inefficiency of Aman rice in coastal areas of Bangladesh

Despite of being an extremely overpopulated country with a limited land resource, Bangladesh has managed to increase its food production to a viable level. Yet it is necessary to increase production of food crop in order to cope with the growing population in a sustainable way. Closing yield gap is a means of attaining sustainability of agricultural intensification to keep pace with the growing crop demand. The objective of the present study is to assess the inefficiency and the yield gap of Aman rice production in climate vulnerable areas in Bangladesh. The study was conducted in Shaymnagar and Kaliganj Upazilas of Satkhira district in Bangladesh and data were collected using a stratified random sampling technique from 110 Aman cultivating farmers. Descriptive statistical techniques as well as Stochastic Frontier model were used to achieve the objectives of the study. The study revealed that, Aman rice cultivation was profitable in the study area. We estimated the model based yield gap, highest recorded yield gap and experimental yield gap. The mean efficiency analysis revealed that farmers could increase their production with optimal use of inputs and proper management systems. Absence of proper knowledge about the optimum input use and lack of institutional training as well as inadequate extension services were responsible for the reduced yield in most farmers’ fields. Salinity has reduced the overall productivity of the region, but it is believed that by popularizing the practice of saline tolerant rice variety and addressing the above mentioned issues the potential production can be achieved in the coastal region. Progressive Agriculture 30 (4): 395-404, 2019

An Algorithmic Approach to Modelling the Co-Evolution of Parasites and Their Hosts

This paper is a reformulation of the paper, Mode 1958 Evolution 12:158 - 165, which was written in terms of a deterministic paradigm, using di erential equations In this paper, however, the working paradigm will be stochastic, and from the mathematical point of view, it will be a stochastic process that may be viewed as a branching process within a branching process. In particular, it will be assumed that the population of host plants will evolve as a multitype branching process, and the pathogen, which grows on the leaves of the host in every generation of the host, will also be assumed to evolve as a multitype branching processes during each generation of the host. The contents of this paper, were motivated by problems in Agriculture in which Plant Pathologists and Plant Breeders work together to control the damage inflicted by a pathogen on a growing crop of a cultivar such as flax, wheat. and many other cultivars. The focus of attention in this paper is the development of algorithms that will guide the development of software to run Monte Carol simulation experiments taking into account mutations in the host and pathogen. The writing of software to implement the algorithms developed in this paper would require a major e ort, and is, therefore, beyond the scope of this paper

Growth of Wheat and Na+/ K+ Ratio under Neutral and Alkaline Salts Stress

Saline soils contain multiple types of soluble salts. Role of alkaline salts (AS) may be different than neutral salts (NS) for crop growth. Usually these types of salinity frequently co-exist. Neutral salts generally induce osmotic stress and ion-induced injury to growing crop plants. Behavior of AS may be different due to high pH. This study was conducted to see the response of wheat growth and Na+/ K+ ratio under AS and NS application as nutrient solution study. Germinated disinfected seeds of wheat (Cv. Pak-13) and raised in sand. Ten days seedlings were transferred to pots containing standard nutrients solution, with the application of 30 and 60 mM of NS (NaCl, Na2SO4) and AS (NaHCO3 and Na2CO3) separately in 1:1 ratio using complete randomize design in triplicates. The seedling growth period in salt solution comprised 33 days. Biomass and the selected inorganic ions were affected significantly (p< 0.01) under salt stress. The magnitude of loss of bio mass was 11 percent higher in AS than that of NS application. Phosphorus and sulphur concentration were lower 10 and 7 percent with AS than NS respectively besides high Na+/K+ ratio and pH. Further such studies on salt tolerant crop varieties can be carried out to differentiate response under different types of salts.

Flame-weeding: Impact on soybean plants and soil microorganisms

Flame-weeding is a very useful method for weed control, especially in organic production where the use of herbicides is prohibited. With this method heat sup?presses weeds in row within a second. Apart from this, heat also affects growing crop plants and surrounding soil. The aim of this paper was to determine the effect of different propane doses, on photosynthetic and polyphenolic (total flavonoids and anthocy?nins) pigments in soybean leaves, as well as the number of microorganisms in the soil. Soybean plants exposed to flame showed a different reaction to high temperature stress, which was reflected in differ?ent content of analyzed biochemical parameters, but the most responsive were anthocyanins. Actinomycetes turned out to be the most sensitive group of soil microorganisms affected by weed flaming, while fungi were the most tolerant.