scholarly journals The Impact of Nitrogen Fertilization and the Use of Biostimulants on the Yield of Two Maize Varieties (Zea mays L.) Cultivated for Grain

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1408
Author(s):  
Krzysztof Kapela ◽  
Anna Sikorska ◽  
Marek Niewęgłowski ◽  
Ewa Krasnodębska ◽  
Krystyna Zarzecka ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Control Object ◽  
Maize Yield ◽  
Family Farm ◽  
Maize Varieties ◽  
Maize Grain ◽  
Set Up ◽  
Hybrid Cultivar ◽  
The Impact

The field experiment was carried out in 2015–2017 on a family farm in Toczyski Czortki, in the Mazovia voivodeship in Poland. The experiment was set up in a split–split–plot system in three replications. The area of one plot was 30 m−2. The studied factors were: I—two maize varieties: PR38N86 (medium late hybrid cultivar 280 FAO), P8400 (medium early hybrid cultivar 240 FAO); II—four doses of nitrogen fertilization: 1. control object—without the use of nitrogen (0 kg N·ha−1), 2. nitrogen dose—80 kg N·ha−1 (applied once before sowing), 3. nitrogen dose—120 kg N·ha−1 (applied once before sowing), 4. nitrogen dose—160 kg N·ha−1 (applied once before sowing); III—four types of biostimulants used: 1. control object—without using a biostimulant, 2. Asahi®SL biostimulant: I term—four-leaf phase (BBCH 14) at a dose of 0.60 dm3∙ha−1, II term—eight-leaf phase (BBCH 18) at a dose of 0.60 dm3∙ha−1, 3. Improver® biostimulant: I term—four-leaf phase (BBCH 14) at a dose of 1.00 dm3∙ha−1, II term—eight-leaf phase (BBCH 18) at a dose of 0.60 dm3∙ha−1, 4. Zeal® biostimulant: I term—six-leaf phase (BBCH 16) at a dose of 2.00 dm3∙ha−1. The aim of the study was to determine the effect of nitrogen fertilization and the use of biostimulants on the size and quality of yield of two varieties of maize grown for grain. Based on the conducted research, it was found that nitrogen doses influenced the amount of maize grain obtained. The highest yields were obtained using 120 kg N∙ha−1. Nitrogen doses significantly affected the studied maize yield components. The dose of 120 kg N∙ha−1 increased the number of grains in the cob, while the dose—160 kg N∙ha−1 exerted the best effect on obtaining the highest values of a thousand seeds. The biostimulants used in the experiment significantly affected the mass of one thousand seeds and the number of grains in the cob. In addition, Asahi®SL, Improver® and Zeal® biostimulants increased maize yield in each growing season studied.

Impact of SSM/I Observations Related to Moisture, Clouds, and Precipitation on Global NWP Forecast Skill

2008 ◽  
Vol 136 (7) ◽  
pp. 2713-2726 ◽  
Author(s):  
G. A. Kelly ◽  
P. Bauer ◽  
A. J. Geer ◽  
P. Lopez ◽  
J-N. Thépaut
Keyword(s):  
Initial Conditions ◽  
Forecast Skill ◽  
Clear Sky ◽  
Microwave Imager ◽  
Set Up ◽  
The Tropics ◽  
The Impact ◽  
Northern And Southern Hemispheres ◽  
Experiment Duration

Abstract This paper presents the results from the Observing System Experiments (OSEs) with the current ECMWF data assimilation and modeling system for quantifying the impact on both analysis and forecast quality of Special Sensor Microwave Imager (SSM/I) observations sensitive to moisture and clouds as well as precipitation. SSM/I radiances have been assimilated operationally in clear-sky areas for 8 yr and in cloud- and rain-affected areas since June 2005. This paper examines experiments set up such that clear-sky and rain-affected observations were either added to a baseline with a restricted observing system configuration or withdrawn from the full system. The experiment duration was 10 weeks of which the first 14 days were excluded from the evaluation to allow the system to lose the memory of the initial conditions at day −1. It is shown that both clear-sky and rain-affected observations account for the bulk correction of moisture in the ECMWF analysis. SSM/I data adds 1 day of forecast skill over the first 48 h when evaluated in addition to a baseline-observing system. In the tropics, the rain-affected data contributes more skill to the moisture forecast than the clear-sky data at 700 hPa and above. In the Northern and Southern Hemispheres, the effect is generally weaker and slightly in favor of clear-sky observations. A similar performance can be seen with respect to the wind vector forecast skill, which reflects the connection between the analysis of moisture and dynamics.

scholarly journals CARACTERIZACIÓN AMBIENTAL DE LA ENSENADA DE PLAYA GRANDE, ESTADO SUCRE, VENEZUELA

2016 ◽  
Author(s):  
J. Castañeda ◽  
William James Senior ◽  
Arístide Márquez ◽  
Ángel González
Keyword(s):  
Single Point ◽  
Coastal Region ◽  
Fecal Coliforms ◽  
Trade Winds ◽  
Human Contact ◽  
Hydrographic Conditions ◽  
Chemical Conditions ◽  
Set Up ◽  
The Impact

The hydrographic conditions and sanitary quality of the waters of the coastal region of Playa Grande Baywere studied during May 2003. We set up 21 stations to collect surface and bottom samples and three current meters – anupward-mounted hydroacoustic profiler and two single-point Doppler current sensors that operated for 14 days. Samples werecollected in 5-L Niskin bottles equipped with a lid-closing device operated through a cable. The samples were studied accordingto established methods for seawater analysis. The pH ranged between 7.93 and 8.31; the temperature, between 22.0 and 24.0ºC; the salinity, between 36.56 and 37.17 units; the color, between 15 and 30 Pt-Co units. The biochemical oxygen demandranged between 4.05 and 68.96 mg/L; and total nitrogen, between 0.53 and 1.27 mg/L. Total phosphate fluctuated between0.02 and 0.16 mg/L; lipids, between 0.08 and 0.39 mg/L; aliphatic hydrocarbons, between 0.01 and 0.12 mg/L. Detergents didnot exceed the value of 0.02 mg/L. In some cases, total and fecal coliforms reached values beyond the limit of 1000 NMP/100ml for total coliforms set by the Ministry of the Environment for type 4 waters (partial and total human contact). Thequality of these waters shows the impact of effluents, running mostly from east to west, in the sector of Campo Ajuro. Thephysical and chemical conditions of the waters of this bay may vary throughout the year as a consequence of the dynamicconditions prevailing in the region. It is recommended that these studies be carried out at least twice a year: during the dryseason (December to May), when the trade winds increase, and during the rainy season (June to November).

scholarly journals Impact of Irrigation and Fertigation on the Yield and Quality of Sugar Beet (Beta vulgaris L.) in a Moderate Climate

Agronomy ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 166 ◽  
Author(s):  
Jacek Żarski ◽  
Renata Kuśmierek-Tomaszewska ◽  
Stanisław Dudek
Keyword(s):  
Sugar Beet ◽  
Nitrogen Fertilization ◽  
Sugar Content ◽  
Sprinkler Irrigation ◽  
Irrigation Amount ◽  
Beet Root ◽  
Yield And Quality ◽  
The Impact ◽  
Moderate Climate

In Poland, under conditions of the moderate climate and transition between maritime and continental climates, the average rainfall totals of the growing season are in the range of 350–400 mm; however, they are distinguished by great temporal and spatial variability. Climatological studies demonstrate that the drought frequency is approximately 30%. Therefore, under such conditions, irrigation has a supplementary and intervention nature and is applied only when dry periods occur. The aim of this study was to determine the impact of sprinkler irrigation and increased nitrogen fertilization on the yield and quality of sugar beet roots and yield of sugar. The average increase of the yield under irrigation was 18.1 t·ha−1 which constituted a 22.8% increase in the yield. Furthermore, there was a marked tendency of a higher sugar content in the roots of irrigated plants. The absolute, relative, and unit average sugar beet root yield increases obtained under the influence of sprinkler irrigation and the lack of a significant diversity in the sugar content in roots confirm that irrigation contributed to an appropriate pace of plant growth and development. The increased rate of nitrogen fertilization (N2) of 160 kg N·ha−1 plus an additional 40 kg N·ha−1 resulted in the significantly greater root yields compared to the control (N1) (160 kg N·ha−1), i.e., an average of 7.6 t·ha−1 (9%). Based on the crop-water production function, the maximum root yields were obtained for the N1 rate at a total precipitation and irrigation amount of 382 mm, compared with 367 mm for the N2 rate.

Educating Students for E-Entrepreneurship in the UK, the USA and China

2009 ◽  
Vol 23 (3) ◽  
pp. 243-252 ◽  
Author(s):  
Cindy Millman ◽  
Wang-Chan Wong ◽  
Zhengwei Li ◽  
Harry Matlay
Keyword(s):  
Entrepreneurship Education ◽  
Policy Makers ◽  
Rigorous Research ◽  
Growing Body ◽  
The Usa ◽  
Political Conditions ◽  
Set Up ◽  
The Uk ◽  
The Impact

A growing body of research evaluates various aspects of entrepreneurship education (such as curriculum, delivery and assessment) and links it to outcomes in terms of both the number and quality of entrepreneurs entering an economy. There is, however, a marked paucity of empirically rigorous research appraising the impact of entrepreneurship education on graduates' intentions and perceived ability to set up Internet-based e-enterprises that can operate across temporal and geographical boundaries. This paper provides a comparative overview of entrepreneurship education in the UK, the USA and China with a focus on IT and non-IT students' e-entrepreneurship intentions, perceptions and outcomes. The research on which the paper is based was carried out in two distinct phases: first, focus groups were used to design, pilot and develop a comprehensive research questionnaire for use in a wider, multi-country survey; second, questionnaires were then distributed to students in IT and non-IT related disciplines in the UK, the USA and China. The preliminary results show that most respondents were slow to conceptualize and contextualize e-entrepreneurship in the prevailing socio-economic and political conditions of their countries of origin. There were no significant differences between students of IT and non-IT disciplines in their perceptions of the viability and practicality of engaging in e-entrepreneurship. Generic support initiatives appear to neglect the vast portfolio of skills needs for graduates engaging in Internet trading. The authors recommend that entrepreneurship education providers should engage with emergent models of e-entrepreneurship and that policy makers should provide innovative initiatives to cater for the specific needs of e-entrepreneurs.

ToeHold Artisans Collaborative: Building Entrepreneurial Capabilities to Tackle Poverty

2008 ◽  
Vol 12 (02) ◽  
pp. 187-213 ◽  
Author(s):  
Sindhu Shanmugam ◽  
S. Ramakrishna Velamuri
Keyword(s):  
Social Enterprises ◽  
Non Profit ◽  
Self Help ◽  
Economic Stagnation ◽  
Effective Organization ◽  
Set Up ◽  
Self Help Groups ◽  
The Impact ◽  
Group Enterprise

Toehold Artisans Collaborative (TAC) is a project launched by the Asian Center for Entrepreneurship Initiatives (ASCENT), a non-profit organization based in Bangalore, to build entrepreneurial capacity in a community of footwear artisans of the small southern Indian town of Athani. Prior to ASCENT's involvement, which began in 1998, the artisans of Athani were making a subsistence wage, which did not even guarantee them two square meals a day. They could not send their children to school and were thus suffering from economic stagnation. TAC is an established Group Enterprise of 14 women Self Help Groups (SHG). Even though women's SHGs are the direct stakeholders, the men are not left out — they are treated as co-preneurs for all inputs, exposure to international fairs and production purposes. The front end of TAC is a customer-centric business enterprise that has taken the exquisite footwear brand 'ToeHold™' to challenging international mainstream markets. The backend is an artisan-centric social enterprise striving for improvement in the quality of life of about 400 artisans' families. The case documents how TAC was set up and evolved during the 1998–2006 period, the challenges it faced and continues to face, and the impact it has had on the artisan community. It is useful for examining the effective organization and running of social enterprises.

Research on the Crashworthiness of Neotype Flexible Safety Fence

2012 ◽  
Vol 204-208 ◽  
pp. 1689-1692
Author(s):  
Zheng Bao Lei ◽  
Li Hong Li ◽  
Mu Xi Lei ◽  
Chen Chen Chen
Keyword(s):  
Impact Test ◽  
Lateral Displacement ◽  
Full Scale ◽  
Element Analysis ◽  
Evaluation Standard ◽  
Analysis Computer ◽  
Set Up ◽  
The Impact ◽  
Fence Methods

In order to identify the crashworthiness of neotype flexible safety fence, methods was created by conducting FEA (finite element analysis) computer simulation and full-scale impact test based on the current available evaluation standard. Above all, the model of “vehicle-guardrail” was set up based on virtual proving ground (VPG) pretreatment software, the safety in the impact between vehicle and neotype flexible safety fence were studied from the aspects of the moving locus of vehicle, the acceleration of vehicle and the maximum lateral displacement of guardrail etc. Secondly, full-scale impact test was conducted for the guidance quality of guardrail to the tested vehicle. The test results indicated that the neotype flexible safety fence was inconspicuous to the tested-car, which was basically the same to the simulation results, and the evaluation parameter of guardrail met the acceptance criteria.

scholarly journals The Role and Experience of Sudan in Assisting To Develop and Implement National Drug Policies

2019 ◽  
Vol 4 (11) ◽  
Keyword(s):  
Selection Process ◽  
Professional Associations ◽  
National Drug ◽  
Medical Devices Act ◽  
Drug Policies ◽  
Government Deficit ◽  
The Government ◽  
Set Up ◽  
The Impact

The strategy of price liberalisation and privatisation had been implemented in Sudan over the last decade, and has had a positive result on government deficit. The investment law approved recently has good statements and rules on the above strategy in particular to pharmacy regulations. Under the pressure of the new privatisation policy, the government introduced radical changes in the pharmacy regulations. The 2001 Pharmacy and Poisons Act and its provisions established the Federal Pharmacy and Poison Board (FPPB). All the authorities of the implementation of Pharmacy and Poisons Act were given to this board. This article provides an overview of the impact of the pharmaceutical regulations on the quality of medicines on the Sudanese market from the perspective of the pharmacists working with drug importing companies. The information necessary to conduct the evaluation was collected from 30 pharmacists who are the owners or shareholders in medicines’ importing companies. The participants were selected randomly. 89% of respondents considered the medicines on the Sudanese market are generally of good quality. The design of the research itself may be considered inadequate with regard to selection process. However, the authors believe it provides enough evidence, and the current pharmaceutical regulations have some loopholes. The Pharmacy, Poisons, Cosmetics and Medical Devices Act-2001 and its regulation should be enforced. The overall set-up including the Act itself needs to be revised. The emerging crisis in pharmacy human resources requires significant additional effort to gather knowledge and dependable data that can inform reasonable, effective, and coordinated responses from government, industry, and professional associations. Furthermore research should be carried out to understand the scope, magnitude directions of the migratory flows, within and outside the country, as well as the characteristics and skills of the emigrated pharmacists.

scholarly journals Implementation of a TMS-fMRI system: A primer

2021 ◽  
Author(s):  
Golnoush Alamian ◽  
Ruiyang Ge ◽  
Erin L. MacMillan ◽  
Laura Barlow ◽  
Afifa Humaira ◽  
...  
Keyword(s):  
Network Connectivity ◽  
Brain Regions ◽  
Pharmacological Intervention ◽  
University Of British Columbia ◽  
Functional Images ◽  
Fluctuation Noise ◽  
Spatial Noise ◽  
Set Up ◽  
The Impact

Transcranial magnetic stimulation (TMS) is a non-invasive and non-pharmacological intervention, approved for the treatment of individuals diagnosed with treatment-resistant depression. This well-tolerated approach uses magnetic pulses to stimulate specific brain regions and induce changes in brain networks at multiple levels of human functioning. Combining TMS with other neuroimaging techniques, such as functional magnetic resonance imaging (fMRI), offers new insights into brain functioning, and allows to map out the causal alterations brought on by TMS interventions on neural network connectivity and behaviour. However, the implemention of concurrent TMS-fMRI brings on a number of technical challenges that must be overcome to ensure good quality of functional images. The goal of this study was thus to investigate the impact of TMS pulses in an MR-environment on the quality of BRAINO phantom images, in terms of the signal of the images, the temporal fluctuation noise, the spatial noise and the signal to fluctuation noise ratio, at the University of British Columbia (UBC) Neuroimaging facility. The results of our analyses replicated those of previous sites, and showed that the present set-up for concurrent TMS-fMRI ensures minimal noise artefact on functional images obtained through this multimodal approach. This step was a key stepping stone for future clinical trials at UBC.

scholarly journals Ethical Leadership, Employees Commitment and Organizational Effectiveness: A Study of Non-Faculty Members

2021 ◽  
Vol 7 (2) ◽  
pp. 161-172
Author(s):  
Abayomi Olarewaju Adeoye
Keyword(s):  
Organizational Effectiveness ◽  
Ethical Leadership ◽  
Faculty Members ◽  
University Management ◽  
University Environment ◽  
Organization Effectiveness ◽  
Set Up ◽  
Descriptive Survey ◽  
The Impact

The expansion, growth and maintaining competitiveness is a function of good and effective leadership in place coupled with the commitment on the part of both the employees’ and the firm itself that will determine the organization effectiveness. The thrust of this article is to scrutinize the impact of ethical leadership and employees’ commitment on organizational effectiveness in an academic set-up by focusing on non-faculty members. The research design adopted was descriptive survey and 200 questionnaires were administered out of which 181 (90.5%) were found usable for the study. Three hypotheses were tested and the result revealed that there is a relationship between ethical leadership and organizational effectiveness. It was found out that ethical leadership influences employees’ commitment and attitude to work. It was equally established that there is significant relationship between ethical leadership, employees’ commitment and organizational effectiveness. It is concluded that ethical leadership is a propeller that will drive employees’ commitment and enhance organizational effectiveness in a university environment. The study therefore recommended amidst others that university management should attempt to embrace ethical leadership as an indicator which will help in improving the quality of service and increase employees’ sense of commitment. Ethical leadership should be given a paramount consideration in the institution in other to improve employees’ commitment in order to achieve organizational effectiveness. (JEL L29, J5, I2) Keywords: Employees Commitment, Ethical Leadership, Non-Faculty Members, Organizational Effectiveness.

scholarly journals Efficiency in nitrogen management using conventional and transgenic technology in the cultivation of maize

2021 ◽  
Vol 7 ◽  
pp. 1-12
Author(s):  
Ivan Ricardo Carvalho ◽  
Márcio Peter ◽  
Gustavo Henrique Demari ◽  
Francine Lautenchleger ◽  
Filipe Selau Carlos ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Block Design ◽  
Maize Yield ◽  
Nitrogen Partitioning ◽  
Transgenic Technology ◽  
Maize Crop ◽  
Randomized Block Design ◽  
Genetic Technologies ◽  
Set Up

The objective to evaluate the maize yield components as a function of the top-dressing nitrogen partitioning in maize plants with conventional and transgenic technology. The experiment was carried out in the agricultural crops of 2012/2013 and 2013/2014, in the municipality of Tenente Portela-RS, Brazil. The experiment was set up in a randomized block design in a factorial scheme with two genetic technologies x 11 nitrogen fertilization treatments, arranged in three replications. The treatments were composed of top-dressing applications in the phenological stages V2 - two fully expanded leaves, (V2), V4 - four fully expanded leaves, (V4), V6 - six fully expanded leaves (V6) and V8 - with eight fully expanded leaves (V8) and split applications in V2+V4; V2+V6; V2+V8; V4+V6; V4+V8; V6+V8; and V2+V4+V6+V8. There was interaction between genetic technologies and levels of nitrogen fertilization in the maize crop. The highest grain yield was obtained with conventional technology because it presented plants with greater prolificacy, ear diameter and number of grains per row. Grain yield was superior with nitrogen fertilization in V4 and in nitrogen splitting in the V4 + V6, V4 + V8 and V2 + V4 + V6 + V8 stages.

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