scholarly journals Dynamics and control of cereal bugs in spring barley crops in conditions of Right-bank Forrest-steppe of Ukraine

2021 ◽  
Vol 1 (99) ◽  
pp. 181-188
Author(s):  
R. V. Chukhrai ◽  
Keyword(s):  
Technical Efficiency ◽  
Yield Loss ◽  
Crop Yields ◽  
Spring Barley ◽  
Eurygaster Integriceps ◽  
Lygus Rugulipennis ◽  
National University ◽  
Dynamics And Control ◽  
And Control

Cereal bugs can reduce the yield of cereals, worsen the quality characteristics of grain, and reduce the sowing quality of seeds with intensive reproduction and nutrition. Of all the cereal bugs, Eurygaster integriceps Put is the most damaging. According to scientists, yield loss is typically estimated at 20–30 % in barley and 50–90 % in wheat. In addition to direct crop losses, insects also inject chemicals that dramatically reduce grain quality, with chemical pest control costing over $40 million annually. The aim of the research is to reveal data on the species diversity of cereal bugs in spring barley crops in the conditions of the Uman national university of horticulture and to control their numbers in order to preserve crop yields. Accounting and observations conducted in 2017–2020, in the training and production department of Uman National University of Horticulture. Analysis of the species composition of cereal bugs allowed to clarify the diversity of their species, establish their average number and identify species that are dangerous for cultures during the study period. It was established that five species of cereal bugs which were dangerous to culture were identified from a number of Hemiptera between 2017 and 2020. Four species of cereal bugs were constantly present in the agrocenosis of spring barley – Eurygaster integriceps Put., Aelia acuminata L., Lygus rugulipennis P. and Trigonotylus coelestialium Kirk.. The most dangerous pest for the culture was the species Eurygaster integriceps Put., Which accounted for 36 %, 28 %, 27 % and 24.5 % of the total number of bedbugs, and also exceeded the rate of harmful index. The use of insecticides reduced the number of Eurygaster integriceps Put. for a two-week period after spraying. Average data for 2018–2020 show high technical efficiency at the level of 90.0–92.9 % on the 3rd day after spraying. On the 7th day after the insecticides were applied, the technical efficiency was 85–85.8 %. Application of insecticide Decis Profi 25 WG, v.g. at a rate of 0.04 kg/ha, reduced the number of pests by 82.5 % on the 14th day after spraying.

Productivity and quality of soybean seeds with different fertilization on podzolized chernozem

2020 ◽  
Vol 1 (97) ◽  
pp. 136-144
Author(s):  
H.M. Hospodarenko ◽  
◽  
I.V. Prokopchuk ◽  
K. P. Leonova ◽  
V.P. Boyko
Keyword(s):  
Crop Rotation ◽  
Crop Yields ◽  
Spring Barley ◽  
Mineral Fertilizer ◽  
Nitrogen Fertilizers ◽  
Mineral Fertilizers ◽  
Forest Steppe ◽  
Soybean Seeds ◽  
Different Doses

The productivity of agricultural crops is the most variable and integral indicator of their vital activity, which accumulates their genetic potential, soil fertility, weather conditions and components of agricultural technology. Soybean under optimal growing conditions (the reaction of the soil is close to neutral, sufficient phosphorus and potassium nutrition, the use of nitraginization) assimilates from the air about 70 % of the total nitrogen requirement. Therefore, it is believed that it is enough to apply only a starting dose of nitrogen fertilizers (20–40 kg/ha a. s.), to get a high yield with good indicators of grain quality. The results of studies of the influence of long-term (8 years) application of different doses and ratios of fertilizers in field crop rotation on podzolized chernozem in the conditions of the Right -Bank Forest-Steppe of Ukraine on the yield and quality of soybean seeds preceded by spring barley were presented. It was found that crop yields could be increased by 18–77 % owing to different doses, ratios and types of fertilizers. The highest indicators of seed yields for three years of the research (3,02 t/ha) were obtained under the application of mineral fertilizers at a dose of N110P60K80 per 1 ha of crop rotation area, including under soybean – N60P60K60. Exclusion of the nitrogen component from the complete fertilizer (N60P60K60) reduced its yield by 26 %, phosphorus – by 17, and potassium by 11 %. There was no significant decrease in soybean yield in the variant of the experiment with a decrease in the proportion of potassium in the composition of complete mineral fertilizer (N60P60K30) for three years of study. The largest mass of 1000 soybean seeds was formed at doses of N60К60 fertilizers, and their protein content — under the application of complete mineral fertilizer in doses of N60P60K60 and N60P60K30.

Investigations into Alternative Methods to Predict the Competitive Effects of Weeds on Crop Yields

Weed Science ◽  
1996 ◽  
Vol 44 (2) ◽  
pp. 290-297 ◽  
Author(s):  
Peter J.W. Lutman ◽  
Ruth Risiott ◽  
H. Peter Ostermann
Keyword(s):  
Yield Loss ◽  
Crop Yields ◽  
Spring Barley ◽  
Ground Cover ◽  
Dry Weight ◽  
Alternative Methods ◽  
Competitive Effects ◽  
Weed Density ◽  
Faba Beans ◽  
Visual Assessments

Sixteen experiments have investigated alternative methods of predicting the competitive effects of a simulated weed (oats) on the yields of spring barley, spring oilseed rape (canola), peas, spring field (faba) beans and flax. The experiments were designed to discover whether early postemergence assessments of crop and weed vigor would achieve more reliable prediction of yield loss than weed density. Weed density (plants m−2) was a very variable predictor of yield loss. The standardized ranges (range/mean) of values over 3 to 4 years of data for the five crops, in the densities causing 5% yield loss, were between 1.14 and 2.59. Predictions based on the relative dry weight of crop and oats (oat dwt/(oat dwt + crop dwt)), assessed while the plants were still small, achieved more reliable predictions, as the standardized ranges were between 0.10 and 1.86. In three of the experiments, predictions based on relative dry weights were compared to similarly timed predictions based on measurements of relative leaf area and of ground cover, assessed subjectively (by eye) and photographically. Subjective and objective (photographic) assessments of cover achieved similar predictions of yield loss, indicating that visual assessments could be a viable tool to assess the potential competitive effects of weeds.

Design and Construction of Grid Attached Storage Simulator

2011 ◽  
Author(s):  
Markus Lutz ◽  
Daniel Zimmerle ◽  
Brian Huff ◽  
Thomas Bradley
Keyword(s):  
Second Life ◽  
Frequency Regulation ◽  
State University ◽  
Variable Frequency Drive ◽  
Colorado State University ◽  
Dynamics And Control ◽  
Battery Degradation ◽  
Design Selection ◽  
And Control

Using a Variable Frequency Drive, 15kWh battery pack, and Active Front End control, Colorado State University has designed and built a real-world functional test stand to study the effects of attaching a battery power pack to the grid for grid stabilization. This paper describes the design, analysis, and construction of the Grid Attached Storage simulation laboratory. An in-depth discussion of the design, selection and specifications of components including the LCL filter, transformer, grid attachment, line synchronization card, software control, and safety measurements is discussed. The dynamics and control of grid-attached storage can be investigated using this lab. Battery temperatures, charging/discharging cycles, and battery degradation can also be better understood with the use of this system. Second life batteries can be used as well to investigate their characteristics, economical benefits, and quality of use. Using grid interaction, the batteries can work in a variety of ways including: frequency regulation, V2G simulation of opportunity charging, and renewable energy smoothing.

scholarly journals PKM Kelompok Petambak Udang Dalam Upaya Memantau dan Menjaga Kualitas Tambak di Kecamatan Mlonggo Kabupaten Jepara

2019 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Buang Budi Wahono ◽  
Dias Prihatmoko ◽  
Luky Mudiarti
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Crop Yields ◽  
Pond Water ◽  
Harvest Time ◽  
Monitoring And Control ◽  
Management Skills ◽  
Turn On ◽  
And Control

Gumuk Mas and Udang Lestari is a group of shrimp farmers in the Kec. Mlonggo Kab. Jepara. in checking water quality still uses traditional methods, namely by seeing the shrimp floating on the surface of the pond. if there is, the shrimp lacks oxygen, is prone to disease and will interfere with its breeding. when approaching the harvest time the shrimp farmers turn on the waterwheel continuously every day so that the shrimp does not lack DO (Dissolved Oxygen), even if the waterwheel continues then it will result in excess DO and wasteful electricity. Therefore we need a solution for checking water quality and waterwheel control. this activity proposes two main activities, namely training and farm management skills well related to monitoring and control of Dissolved Oxygen. this activity so that shrimp farmers can monitor the quality of shrimp pond water at any time. if water quality is lacking or exceeds the limit, prevention activities can be carried out as soon as possible and can increase crop yields and the welfare of shrimp farmers

Resistance Monitor and Control for Vacuum Evaporation of Metals and Carbon

1976 ◽  
Vol 34 ◽  
pp. 572-573
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe ◽  
J. Michael Moseley
Keyword(s):  
Electronic Device ◽  
Point Sources ◽  
High Contrast ◽  
Variable Resistor ◽  
Quality Of Results ◽  
Low Contrast ◽  
Evaporation Source ◽  
And Control ◽  
At Will

We have designed and built an electronic device which compares the resistance of a defined area of vacuum evaporated material with a variable resistor. When the two resistances are matched, the device automatically disconnects the primary side of the substrate transformer and stops further evaporation.This approach to controlled evaporation in conjunction with the modified guns and evaporation source permits reliably reproducible multiple Pt shadow films from a single Pt wrapped carbon point source. The reproducibility from consecutive C point sources is also reliable. Furthermore, the device we have developed permits us to select a predetermined resistance so that low contrast high-resolution shadows, heavy high contrast shadows, or any grade in between can be selected at will. The reproducibility and quality of results are demonstrated in Figures 1-4 which represent evaporations at various settings of the variable resistor.

Boilerplate

2012 ◽  
Author(s):  
Margaret Jane Radin
Keyword(s):  
Economic Efficiency ◽  
Analytical Framework ◽  
Daily Basis ◽  
Regulatory Agencies ◽  
Jury Trial ◽  
Comprehensive Treatment ◽  
New Methods ◽  
And Control ◽  
Fine Print

Boilerplate—the fine-print terms and conditions that we become subject to when we click “I agree” online, rent an apartment, or enter an employment contract, for example—pervades all aspects of our modern lives. On a daily basis, most of us accept boilerplate provisions without realizing that should a dispute arise about a purchased good or service, the nonnegotiable boilerplate terms can deprive us of our right to jury trial and relieve providers of responsibility for harm. Boilerplate is the first comprehensive treatment of the problems posed by the increasing use of these terms, demonstrating how their use has degraded traditional notions of consent, agreement, and contract, and sacrificed core rights whose loss threatens the democratic order. This book examines attempts to justify the use of boilerplate provisions by claiming either that recipients freely consent to them or that economic efficiency demands them, and it finds these justifications wanting. It argues that our courts, legislatures, and regulatory agencies have fallen short in their evaluation and oversight of the use of boilerplate clauses. To improve legal evaluation of boilerplate, the book offers a new analytical framework, one that takes into account the nature of the rights affected, the quality of the recipient's consent, and the extent of the use of these terms. It goes on to offer possibilities for new methods of boilerplate evaluation and control, and concludes by discussing positive steps that NGOs, legislators, regulators, courts, and scholars could take to bring about better practices.

PROJECT ON ELECTRONIC STEERING SYSYTEM

2018 ◽  
Vol 4 (5) ◽  
pp. 7
Author(s):  
Shivam Dwivedi ◽  
Prof. Vikas Gupta
Keyword(s):  
Steering System ◽  
Essential Elements ◽  
Variable Pressure ◽  
Passenger Cars ◽  
Control Techniques ◽  
Steering Mechanism ◽  
Dynamics And Control ◽  
Active Research ◽  
Electronic Steering ◽  
And Control

As the four-wheel steering (4WS) system has great potentials, many researchers' attention was attracted to this technique and active research was made. As a result, passenger cars equipped with 4WS systems were put on the market a few years ago. This report tries to identify the essential elements of the 4WS technology in terms of vehicle dynamics and control techniques. Based on the findings of this investigation, the report gives a mechanism of electronically controlling the steering system depending on the variable pressure applied on it. This enhances the controlling and smoothens the operation of steering mechanism.

Management and engineering solutions to improve processing stock quality and reduce resource-intensity of mining

2018 ◽  
pp. 56-68
Author(s):  
V. V. Agafonov ◽  
V. Yu. Zalyadinov ◽  
M. E. Yusupov ◽  
N. S. Bikteeva
Keyword(s):  
Development Strategy ◽  
Open Pit ◽  
Mining Operations ◽  
High Concern ◽  
General Production ◽  
Resource Intensity ◽  
Product Output ◽  
And Control ◽  
A Company

Sustainability of mining companies is of of high concern. The problem is specifically acute at companies that are monotownor monosettlement-forming. Sustainability of a mine depends in many ways on product quality and production resource-intensity. This article discusses formation of mineral quality indexes in terms of an open pit chrysotile mine. The studies took into account specific features of operation procedures implemented by each structural division of the mine. The analysis has found managerial and technological inconsistencies which affect quality and marketable product output, as well as efficiency of the mine in whole. The background for efficiency enhancement at a company is, by the authors’ opinion, consolidation of personnel subject to the single development strategy, namely: improvement of production and control efficiency, as well as use of available reserves and resources by means of better setup for production. The proposed approaches to planning mining operations and forming mineral quality allow higher quality of processing stock. In addition, a new model proposed for interaction between structural divisions of a mining company ensures improvement of general production indexes.

EFFICIENT MANAGEMENT SYSTEM OF TEACHING TECHNICAL MEANS AT CENTRAL KINDERGARTEN PEDAGOGY COLLEGE IN INDUSTRIAL REVOLUTION 4.0

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Vũ Xuân Hùng
Keyword(s):  
Intellectual Development ◽  
Industrial Revolution ◽  
Current Period ◽  
Efficient Management ◽  
Urgent Task ◽  
Creative Learning ◽  
Cognitive Activities ◽  
And Control ◽  
Technical Teaching

In the process of teaching, technical teaching facilities are both a content and a means of conveying information, they help the lecturer organize and control the students' cognitive activities, in addition, they also help students be interested in learning, practice practical skills from which to form active and creative learning methods. Teaching technology is one of the necessary conditions to help teachers carry out their related work of educating, teaching and bringing up, and intellectual development, arouse the inherent intelligence qualities of students. Currently, the management of technical teaching facilities at the Central Kindergartens College has been carried out on a regular basis and achieved certain results, but in fact, there are still many inadequacies. Finding a number of limitations in the management of teaching technical facilities, thereby proposing solutions to overcome those limitations, improve the efficiency of investment, preservation and use of teaching technical facilities in the trend of Industry Revolution 4.0, improving the quality of teaching at Central Kindergarten Pedagogy colleges in the current period is a very important and urgent task.

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