The article contains materials of the research on the yield of common plum and cherry plum varieties. The most productive samples have been selected. The productivity of the selected varieties have ...been studied for four years, which includes the following characteristics: average productivity (kg/tree), average productivity from one cubic meter of a crown (kg/m3 ), average fruit weight (g), average productivity (% to the standard). The economic efficiency of common plum and cherry plum for a 5 years period has been studied. The following indicators have taken into account: yield (t/ha), product cost (rubles/ha), production costs (rubles/ha), sales profit (rubles/ha), product profitability (%). It has been found that the productivity of the studied varieties (kg/tree) is quite different. Common plum productivity varies from from 14,4 (Nectar) to 34,6 (Shamsi). That of cherry plum varies from 20 (Rioni) to 34,1 (Shuntukskaya 11). Mathematical processing of data on the yield of fruits of common plum and cherry plum has been carried out using the method of field experiment. Statistical processing of one-factor experiment has been carried out by the method of deviation from the average one according to the variant. 3 groups of plum and cherry plum varieties have been identified at the standard level: low-productive, medium-productive, high-productive. The varieties of cherry plum with high productivity from one cubic meter of crown, more than 2,0 kg/m
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, have been identified: early Niberdzhaevskaya (st), Most early, Shuntukskaya 9, Shuntukskaya 11, Klyukovka, large Nalchikskaya. These include the following varieties of common plum: Renklod Altana, early Kabardinskaya (st), Vascova, Arvita, Hungarian Italian, Anna Shpet (st). The studied varieties of plum and cherry plum are divided into groups according to fruit sizes: small-fruited, medium-fruited and large-fruited. It has been established that the economic efficiency of the production of common plum and cherry plum fruits mainly depends on the yield of the variety and the cost of production. The profitability of common plum varieties is from 59,7% to 130%, cherry plum – from 39,9% to 59,2%.Economic and industrial assessment of common plum and cherryplum in the foothill zone of Adygea.
•Intercalated Fe0.25TiS2 compound with a M5S8-type structure has been synthesized.•Ferromagnetic-like hysteresis loops with Hc up to 45 kOe are observed below 52 K.•First applying the 90 kOe field ...leads to a sharp decrease in resistvity by ~35% at 2 K.•A large remnant magentoresistance (–33%) is observed after zerpoing the field.•An antiferromagnetic (AFM) virgin state is suggested to exist below TN = 52 K.•Application of a magnetic field leads to the irreversible AFM to FM phase transition.
Polycrystalline samples of the intercalation compound Fe0.25TiS2 (FeTi4S8) with an ordered monoclinic crystal structure of the M5S8 type have been synthesized and studied by X-ray diffraction, magnetization and magnetoresistance measurements. It has been shown that application of a magnetic field in the magnetically ordered state (below ~52 K) is accompanied by significant changes in the electrical resistivity (|Δρ/ρ| up to 35%), which is attributed to the phase transition from the virgin antiferromagnetic (AFM) state to the forced ferromagnetic (FM) state. The AFM-FM transition in Fe0.25TiS2 is found to be irreversible, which is supported by the presence of a large remnant magnetoresistance (~–33%). At low temperatures, the magnetization reversal in the forced metastable FM state is accompanied by a large magnetic hysteresis (Hc up to 45 kOe) associated with the presence of an unquenched orbital moment on Fe ions and crystal-field effects. The Hc value is found to decay exponentially with increasing temperature. The Ising character of Fe ions together with magnetoelastic interaction are suggested to result in the existence of a high-coercive metastable FM state in Fe0.25TiS2.
This paper presents a study of a model for deformation of a medium-strength weldable corrosion-resistant low-density aluminum–lithium alloy under impact loading, as well as the identification and ...verification of the parameters of the Johnson–Cook deformation model based on the experiment. The results on the deformation failure criterion under shear impact deformation are also presented.
The strategy providing an estimation of both the mean velocity and the temporal and spatial spectra of radial velocity from data of the same pulse coherent Doppler lidar is proposed. Theoretical ...relations taking into account the averaging over the probing volume while estimating the spectra of fluctuations of the radial velocity measured by lidar are presented. The method of estimation of the turbulent energy dissipation rate and the variance of the vertical component of wind velocity vector from the spectra of radial velocity is carried out. The results of the comparative experiments are discussed and used in further studies of wind turbulence in the atmospheric boundary layer during the formation of low-level jets and propagation of internal gravity waves.
Background. European plum (Prunus domestica L.) is a widespread stone fruit crop in Krasnodar Territory and Adygea. Development of fungal diseases, including brown rot, shot hole, red leaf spot, ...and rust, leads to a significant decrease in the harvest and marketable quality of P. domestica fruits. Therefore, breeding for resistance to these diseases is very important for planting highly productive European plum orchards. The objective of this study was to identify P. domestica cultivars resistant to four fungal diseases under the conditions of the foothill zone of Adygea. Materials and methods. The research material included 25 P. domestica cultivars from the collection orchard of Maikop Experiment Station of VIR. Resistance to fungal diseases was assessed in 2011–2022 using a conventional scale. Results and conclusions. Weather and climate conditions during the flowering, fruit growth and ripening periods of European plum affected the degree of damage inflicted by fungal diseases. Many years of testing resulted in identifying P. domestica cultivars with different scores of resistance to brown rot, shot hole, and rust. Ten P. domestica cultivars were characterized by group resistance to the abovementioned diseases: ‘Anna Shpet’ (k-3325), ‘Vengerka Rannyaya’ (k-3459), ‘Vengerka Italyanskaya’ (k-3444), ‘Musa Dzhaliev’ (k-26994), ‘Vengerka Vkusnaya’ (k-43323), ‘Persikovaya Michurina’ (k-30706), ‘Chernosliv Adygeyskiy’ (k-23743), ‘Chernosliv Shuntukskiy’ (k-23707), ‘Yekaterina’ (yellow) (k-3520), and ‘Vasсova’ (k-27639). They can be recommended to plum breeders for the development of P. domestica cultivars with group resistance to fungal diseases in the foothill zone of Adygea.
Abstract
The paper considers the current trends in the development of standards in the field of electrical measurements. The principles of constructing mutually consistent standards and reference ...complexes using quantum effects and fundamental constants and necessary for reproducing units of quantities used in the fields of electrical, physical-technical and radio-technical measurements, which are also the basis for electro-chemical measurements, are formulated. The results of theoretical and experimental studies aimed at developing possible methods for constructing and implementing ways of quantum standards and reference complexes that implement the principle of mutually consistent reproduction of the basic units of electrical quantities with reference to quantum effects and fundamental constants in accordance with the new definitions of the SI system are presented.
The present article considers the principles underlying the construction of modern standards for electrical units on the basis of quantum effects and fundamental constants. The study was carried out ...in accordance with the new definitions of the International System of Units. Along with a study of the methods used for constructing quantum sensing elements, the authors consider operational modes of the corresponding experimental setup. To that end, an experimental model of the standard was created. Software developed for this task is described along with the measurement procedure. It is demonstrated that the results obtained in the course of experimental studies are in good agreement with theoretical models. Conclusions are drawn about the possible use of the obtained results in the construction of new measurement standards. Tasks for future research are outlined. It is shown that the standards for electrical units on the basis of quantum effects and fundamental constants are used in the metrology of electrical measuring instruments.
Abstract
The article considers the agro-climatic resources of the Republic of Kazakhstan and Central Asia for the period from the beginning of the XXI century to 2021. The spatial distribution of the ...sums of precipitation during the active vegetation period, the sums of active temperatures and HTC in eastern Uzbekistan, Tajikistan, Kyrgyzstan and southeastern Kazakhstan was studied. Calculated indicators for the allocation of agro-climatic zones of the flat part of Kazakhstan and Central Asia. The zoning of the heat supply during the active vegetation period according to the sums of active temperatures (above 10°C), moisture content according to the sums of precipitation during the active vegetation period, the Selyaninov State Customs Committee, the humidification coefficient (HC), which also takes into account the precipitation of the cold period of the year, was carried out. For the flat territory of Kazakhstan and Central Asia, the nature of the latitudinal and meridional strike of zones and their conditional boundaries is considered. For the study area, 20 agro-climatic zones of heat supply during the period of active vegetation and moisture supply during the year were determined.
The polarizability of electrons in CdTe/CdxHg1−xTe/CdTe quantum wells is studied. It is shown that polarizability in the quantum well without cadmium is negative, i.e., the displacement of an ...electron and hole in the main subbands of spatial quantization in an electric field applied perpendicularly to the quantum well plane is opposite to the force acting on it. It is predicted that the negative polarizability can reduce the dielectric constant of quantum wells by up to 15% and manifest itself as the blue shift of the interband light absorption edge in an electric field.
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