Risk versus Economic Return in Managing Groundwater Nitrate Contamination

1993 ◽  
Vol 28 (3-5) ◽  
pp. 55-63 ◽  
Author(s):  
D. D. Adelman ◽  
M. F. Dahab
Keyword(s):  
Management Practices ◽  
Transport Model ◽  
Management Practice ◽  
Farm Management ◽  
Nitrate Contamination ◽  
Nitrate Transport ◽  
Domestic Water ◽  
Economic Return ◽  
Irrigation Rate ◽  
The Impact

A nitrate transport model was developed to project the impact of a substantial buildup of nitrate in the groundwater in the eastern Sandhills region of Nebraska. Predicted nitrate levels were evaluated using a Multi-Criteria Decision Making technique. Two criteria were used to determine optimum farm management practices: economic return to the irrigators and risk to domestic water users. The optimum farm management practice consisted of an above average irrigation rate and a below average nitrogen fertilizer rate. The low fertilization rate had one of the lowest risks of excessive ground water nitrate levels, while the high irrigation rate maximized the economic return. Therefore, this practice was optimal because it was the best compromise between minimum risk and maximum economic return. The risk of excessive groundwater nitrate for the optimum practice was 51 percent and for the other seven practices simulated ranged up to 54 percent.

Can farm-management practices reduce the impact of house mouse populations on crops in an irrigated farming system?

2004 ◽  
Vol 31 (6) ◽  
pp. 597 ◽  
Author(s):  
Peter R. Brown ◽  
Micah J. Davies ◽  
Grant R. Singleton ◽  
J. David Croft
Keyword(s):  
House Mouse ◽  
Management Practices ◽  
Farming System ◽  
Farm Management ◽  
Advisory Panel ◽  
Farming Practices ◽  
Management Actions ◽  
Winter Cereals ◽  
Significant Difference ◽  
The Impact

The impacts of a range of farm-management practices on house mouse (Mus domesticus) populations were tested in a large replicated field study in a complex irrigated farming system in southern New South Wales, Australia. An advisory panel, made up of farmers, extension officers, industry representatives and scientists developed a series of best-practice farm-management actions to minimise the impact of mice. Twelve experimental sites were split into six treated sites, where farmers were encouraged to conduct the recommended practices, and six untreated sites, where farmers conducted their normal farming practices. Mouse abundance was generally low to moderate for the 4-year project (5–60% adjusted trap success). We found significant reductions in population abundance of mice on treated sites when densities were moderate, but no differences when densities were low. Biomass of weeds and grasses around the perimeter of crops were significantly lower on treated sites because of applications of herbicide sprays and grazing by sheep. We could not detect any significant difference in mouse damage to crops between treated and untreated sites; however, levels of damage were low (<5%). Yields of winter cereals and rice crops were significantly higher on treated sites by up to 40%. An analysis of benefits and costs of conducting farming practices on treated sites compared with untreated sites showed a 2 : 1 benefit to cost ratio for winter cereals, 9 : 1 for rice and 4 : 1 for soybeans.

scholarly journals The Requirement of Records Management Practices for Institutional Audits

2018 ◽  
Vol 7 (3.7) ◽  
pp. 228
Author(s):  
Nik Nurul Emyliana Nik Ramlee ◽  
Saiful Farik Mat Yatin ◽  
Mastura Md Zali ◽  
Nurul Aiqa Mohd Zain ◽  
Amzari Abu Bakar ◽  
...  
Keyword(s):  
Management Practices ◽  
Good Governance ◽  
White Collar Crime ◽  
Risk Mitigation ◽  
Management Practice ◽  
Records Management ◽  
Government Sector ◽  
The Government ◽  
Relationship Of ◽  
The Impact

Currently, the issues of corruption or white-collar crime rise in government sector and this issue raised during the audit checking. The organization itself do not take the initiative and follow the policy and standard assigned by the government when manage the records in their organization with the requirement of records management practices. This study also emphasizes the role of records management in conducting the risk mitigation in governance regarding the auditing process, the relationship of the records management and good governance and to analyse the general report of one organization in Malaysia which related with the audit department. With this study, hopefully the good governance and accountability could be achieved and the crime rate could be minimized as well as no litigation occur during the auditing process if the records management practices plays their roles. This study is to investigate the impact of the implementation of good records management practice in exercising good governance and to ease up the auditing process.  

Multivariate classification of farming systems for use in integrated pest management studies

1999 ◽  
Vol 79 (4) ◽  
pp. 647-654 ◽  
Author(s):  
J. Y. Leeson ◽  
J. W. Sheard ◽  
A. G. Thomas
Keyword(s):  
Management Practices ◽  
Farming Systems ◽  
Minimum Variance ◽  
Farm Management ◽  
Management Systems ◽  
Multivariate Techniques ◽  
Organic Systems ◽  
On Farm ◽  
The Impact

On-farm studies provide a realistic setting to examine the impact of interactions of management practices on weed communities within various farming systems. Clustering farm units into groups that use similar management practices enables the replication of farm management systems within on-farm studies. The goal of this study is to objectively classify farm units into management systems on the basis of quantitative variables describing aspects of cropping history and chemical input levels using multivariate techniques. Twenty-eight Saskatchewan farmers provided details of their management practices from 1990 to 1997 through a series of questionnaires. Twelve variables derived from the questionnaires were used to describe cropping history, pesticide, tillage and fertilizer use on each farm unit. These variables were used to cluster farm units using minimum variance classification and NMS ordination. Both techniques identified seven farm management systems. The greatest differences were observed between organic and non-organic systems. Farm management systems that used annual fallow and continuous annual cropping histories were most similar. The consistent results obtained by use of the two unrelated methodologies indicate the utility of this approach for the classification of farm management systems. Key words: Farm management system, classification, cropping history, chemical input level, on-farm

scholarly journals Impact of management practices on construction productivity in Indian building construction projects: an empirical study1

2021 ◽  
Vol 13 (1) ◽  
pp. 2383-2390
Author(s):  
Saurav Dixit
Keyword(s):  
Construction Projects ◽  
Quantitative Research ◽  
Management Practices ◽  
Management Practice ◽  
Relative Weight ◽  
Weighted Average ◽  
Building Construction ◽  
Average Score ◽  
Construction Productivity ◽  
The Impact

Abstract The objective of this study is to analyse the impact of management practices on the productivity of building construction projects in India. The methodology adopted for this study is to identify and analyse the management practice attributes from the literature review and expert focus group interviews. The identified attributes were analysed and priorities using relative weight were given by the respondents. The collected data were further analysed using SPSS 21 software. The quantitative research methodology was adopted to analyse the collected data and the following tools and techniques were applied to the data: reliability analysis to check the consistency of data collected for this study and relative importance index (RII) to prioritise and rank the attributes based on the weighted average score given by the respondents. The findings of this study concluded that coordination between all stakeholders, ability to handle the crisis by the project managers, social skills of key team managers, timely payment of completed works and design capability and frequent design changes are the most significant attributes of management practice, affecting construction productivity and having a rating on the RII of 0.91, 0.90, 0.88, 0.87 and 0.87.

scholarly journals E-waste Management In Indian Microscale Informal Sectors – An Environmental Perspective Towards Policy Regulation

2022 ◽  
Author(s):  
Dipsikha Dasgupta ◽  
Santanu Majumder ◽  
Jishnu Adhikari ◽  
Pinaki Ghosh ◽  
Diane Purchase ◽  
...  
Keyword(s):  
Waste Management ◽  
Informal Sector ◽  
Management Practices ◽  
Management Practice ◽  
Great Influence ◽  
Soil Samples ◽  
Factors Affecting ◽  
Road Map ◽  
Hazardous Metal ◽  
The Impact

Abstract Inappropriate e-waste processing in the informal sector is a serious issue in developing countries. Field investigations in microscale informal recycling sites have been performed to study the impact of hazardous metal(loid)s (released from e-waste dismantling) on the environment (water and soil). Eight hazardous metal(loid)s (Pb, Cd, Cu, Zn, As, Hg, Ni and Cr) were found at elevated levels in the monitored water and soil samples (Sangrampur, West Bengal) as a consequence of widespread informal e-waste handling and primitive processing. Pd, Cu and As were found in high concentrations in water samples (1.62, 1.40, 0.03 mgL-1 respectively). Significant levels of Cu, Pd and Cd were detected in collected soil samples, both topsoil (Cu up to 2328.60 ± 217.60, Pb up to 342.90 ± 32.36 and Cd 18.34 ± 3.81 mgkg-1) and subsurface soil (2491.40 ± 276.20, 1853.33 ± 144.79, 25.90 ± 9.53 mgkg-1), compared to the levels of Zn, As, Hg, Ni and Cr. The results of seasonal variation indicated that higher levels of these hazardous meta(loids) were detected in the pre-monsoon (Nov – May) season than the rest of the year, as open dumping/burning of e-waste were practiced commonly and frequently in the monitored sites. The results highlighted that the composition and the handling of e-waste were important factors affecting the metal(loid) concentrations. E-waste policy and legislation have great influence on the handling and disposal procedures. A novel improved e-waste management practice has been proposed to encourage eco-friendly and safe e-waste disposal. It is recommended that regulatory agencies and manufacturers should create a road map to convince the informal sector to develop a systematic approach towards a more standardized formal e-waste management practices at the microscale field level.

scholarly journals The Impact of Quality Management Practices on Manufacturing Performance: An Empirical Study Based on System Theory

2021 ◽  
Author(s):  
Jie Liu ◽  
Dejuan Zhuang ◽  
Wei Shen
Keyword(s):  
System Theory ◽  
Quality Management ◽  
Management Practices ◽  
Management Practice ◽  
Core Competitiveness ◽  
Manufacturing Enterprises ◽  
Quality Management Practices ◽  
Practice Elements ◽  
Manufacturing Performance ◽  
The Impact

Abstract As one important part of core competitiveness of manufacturing enterprises, quality management practices have gradually received more attention. In many existing researches, quality management practices are regarded as a whole or categorized into two or four types of practice elements for discussions. There are less researches on the relationships among specific quality management practice elements and their impacts on manufacturing performance. This study analyzes quality management practices with the philosophical thinking of system theory, and deconstructs the mechanism of the mutual influences and synergies among various quality management practice elements and also their impacts on manufacturing performance, from an overall perspective through an empirical research. At last, a model of quality management practice synergies is built, as a theoretical support for manufacturing enterprises implementation of quality management practices.

scholarly journals Lean Management Practices’ Effects on Brazilian Firms: A Quantitative and Qualitative Analysis

2021 ◽  
Vol 3 (3) ◽  
pp. 84-108
Author(s):  
Filipe Lage de Sousa ◽  
Mauricio Canêdo-Pinheiro ◽  
Bernardo Pereira Cabral ◽  
Glaucia Estefânia de Sousa Ferreira
Keyword(s):  
Management Practices ◽  
Management Practice ◽  
Cost Effective ◽  
Lean Management ◽  
Short Term ◽  
Firm Level ◽  
Basic Principles ◽  
The Impact ◽  
Innovation Outcomes

One of the key drivers for a firm's productivity growth is management. One lean management practice considered cost-effective is Kaizen. Originally from Japan, the Kaizen basic concept is continuous improvement with the involvement of the full workforce. Using a firm-level dataset from Brazil's innovation and manufacturing surveys, this paper evaluates quantitatively whether Kaizen has impacted the performance of domestic firms. Our initial results suggest a productivity premium on Kaizen adopters, yet when it materializes is not detectable in the short term. Moreover, the impact on innovation is observable after Kaizen implementation. Understanding these outcomes with a qualitative approach, our analysis highlights the importance of Kaizen on innovation, especially by improving worker's time at the production line as well as the long-term vision of Kaizen on productivity. In summary, Kaizen is not a magic wand that improves firms’ performance in a wide array of indicators yet it may boost innovation outcomes in the short term aiming to improve productivity in the long term if it is implemented carefully and persistently, as established by its basic principles.

The potential impact of soil carbon content on ground water nitrate contamination

1996 ◽  
Vol 33 (4-5) ◽  
pp. 227-232 ◽  
Author(s):  
D. D. Adelman ◽  
M. A. Tabidian
Keyword(s):  
Ground Water ◽  
Soil Carbon ◽  
Nitrate Leaching ◽  
Management Practices ◽  
Root Zone ◽  
Denitrifying Bacteria ◽  
Farm Management ◽  
Nitrate Contamination ◽  
Risk Calculation ◽  
Carbon Level

A potential buildup of nitrate in the ground water resources of the eastern Sandhills of Nebraska has been projected to occur due to the intensive use of nitrogen fertilizer on irrigated cropland. A root-zone nitrate leaching study in this area revealed that soils with a high carbon concentration had minimal leaching compared to soils with lower concentrations. Soils high in carbon have an active population of denitrifying bacteria possibly causing denitrification and in turn reduction of nitrate leaching. Denitrifying bacteria are principally heterotrophic using soil organic carbon for both an energy and carbon source. The objective of this research was to interpret how root-zone denitrification affected nitrate leaching and ground water contamination by nitrate. A modified version of a solute transport model developed for the Eastern Sandhills was used to assess the risk of nitrate contamination for combinations of fertilizer and irrigation rates and for various soil carbon levels. The first attempt was to make risk assessment with eight farm management practices for cells with increasingly greater carbon levels until only those cells with the greatest carbon level were kept in production. Results of this assessment showed that even with excessive fertilizer and irrigation rates, risk of nitrate leaching was reduced as the minimum carbon level was increased. However, since less cropland was leaching nitrate with each successive risk calculation, the impact that root-zone denitrification had in nitrate leaching reduction could not be definitively determined. This prompted a model modification of the risk calculation procedure which kept all cropland in production and computed nitrate leachate risk for increasingly higher artificial carbon levels during successive risk calculations. Changing carbon levels was still more detrimental on nitrate leaching rates than changing farm management practices.

Sign in / Sign up

Export Citation Format

Share Document