scholarly journals Soil Amendments and Soil Profiling Impact on Macadamia Growth and Yield Performance

HortScience ◽  
2019 ◽  
Vol 54 (3) ◽  
pp. 519-527
Author(s):  
Russell Galanti ◽  
Alyssa Cho ◽  
Amjad Ahmad ◽  
Theodore Radovich

Macadamia (Macadamia integrifolia, Maiden & Betche) orchard management in Hawaii can result in the loss of organic matter and soil degradation. The objective of this study was to determine the effects of macadamia husk mulch, husk mulch combined with biochar, husk mulch combined with effective microorganisms (EM), soil profiling, and wood chip mulch on yield, nut quality, root growth, and SPAD values during a 1-year study of mature macadamia orchards at two locations in Hawaii. A partial cost–benefit analysis was performed to compare the costs and yield benefits of each treatment. Soil profiling resulted in higher yields than any other treatment, at a mean of 86.6 kg wet-in-husk per tree. No treatments significantly affected nut quality or dry kernel weight. Nut quality was affected by harvesting time, with the earliest harvesting (Aug. 2017) period resulting in the highest recovery rate of number 1 grade kernels (33%). SPAD values increased with the husk mulch combined with EM (6.5%) treatment and soil profiling treatment (6.9%). Husk combined with EM caused an 87% increase in total root biomass during the study period due to increased proteoid root biomass. The soil profiling treatment had the second lowest estimated cost per hectare and had the highest estimated partial profit per hectare. Soil profiling is a destructive management practice and should be used judiciously until its long-term effects on orchard health are studied. The inoculation of EM or sugar signaling may have been responsible for the proliferation of proteoid roots with the husk mulch and EM treatment.

2019 ◽  
Vol 11 (11) ◽  
pp. 3011 ◽  
Author(s):  
Bo-Young Heo ◽  
Won-Ho Heo

Governments have been investing in extensive operations to minimize economic losses and casualties from natural disasters such as floods and storms. A suitable verification process is required to guarantee maximum effectiveness and efficiency of investments while ensuring sustained funding. Active investment can be expected by verifying the effectiveness of disaster prevention spending. However, the results of the budget invested in disaster-safety-related projects are not immediate but evident only over a period of time. Additionally, their effects should be verified in terms of the state or society overall, not from an individualistic perspective because of the nature of public projects. In this study, an economic analysis of the short- and long-term effects of investment in a disaster-safety-related project was performed and the effects of damage reduction before and after project implementation were analyzed to evaluate the short-term effects and a cost–benefit analysis was conducted to assess the long-term effects. The results show that disaster prevention projects reduce damages over both the short and long term. Therefore, investing in preventive projects to cope with disasters effectively is important to maximize the return on investment. This analysis can be used for developing effective disaster prevention projects.


2020 ◽  
pp. 193-198
Author(s):  
A. N. Timokhovich ◽  
O. I. Nikuradze

The problems of measuring the efficiency of social entrepreneurship have been affected. The aim of the study is to identify the most relevant methods for measuring social value and evaluating the effects that arise as a result of the activities of social organizations. Various interpretations of the definition of the term “social entrepreneurship” have been given in the article. The main elements of the process of social entrepreneurship, features of the goal setting and risks of activities in the study area have been emphasized. The stages of planning activities in the field of social entrepreneurship have been described. The most common problems of measurements and evaluation of social effects that social entrepreneurs have to deal with in the process of carrying out activities related to the implementation of social projects: difficulty in achieving a quantitative evaluation, difficulty in predicting the long-term effect of activities, limitations on costs, time resources, indicators of accuracy and interpretation of results have been revealed. Problems in forecasting the effectiveness of social projects have been identified. The main methods that can be used by social entrepreneurs and organizations for measuring the social value and assessing impact of ongoing activities (method of cost-benefit analysis, method of social accounting, method of social return on investment, method of analysis of the main resources of efficiency) have been analysed. Recommendations for social entrepreneurs have been formulated.


2019 ◽  
Vol 125 ◽  
pp. 01003 ◽  
Author(s):  
Wesley Beek ◽  
Bart Letitre ◽  
H. Hadiyanto ◽  
S. Sudarno

The Water as Leverage project aims to lay a blueprint for urban coastal areas around the world that are facing a variety of water-related issues. The blueprint is based upon three real case studies in Bangladesh, India and Indonesia. The case of Indonesia focuses on Semarang, a city that faces issues like flooding, increased water demand, and a lack of wastewater treatment. In this report I summarise the different techniques available to tackling these issues. Along with this I provide a cost-benefit analysis to support decision makers. For a short term it is recommended to produce industrial water from (polluted) surface water as a means to offer an alternative to groundwater abstraction. On a long term it is recommended to install additional wastewater and drinking water treatment services to facilitate better hygiene and a higher quality of life.


2015 ◽  
Vol 73 (5) ◽  
pp. 308-314 ◽  
Author(s):  
Emile Tompa ◽  
Roman Dolinschi ◽  
Hasanat Alamgir ◽  
Anna Sarnocinska-Hart ◽  
Jaime Guzman

Author(s):  
Waincymer Jeffrey

This chapter considers the question of whether an arbitrator may also adopt a mediation function or whether the dual roles are antithetical. It tests that hypothesis by engaging in a cost-benefit analysis of differing scenarios when mediation is utilized in an arbitral context. The prime comparison is between parallel mediation with a separate neutral and the alternative of a dual-role neutral. The three key points are: there should be much more mediation occurring at the international level, regarding both potential and actual arbitral disputes; a commercially minded arbitrator concerned for the parties’ good faith should encourage mediation where appropriate, in particular, when an adjudicated outcome will not be in the interests of either, usually because the dispute is a small part of a long-term relationship that can risk that relationship no matter who wins; and, while informed party autonomy should always support a dual-role neutral, in most factual permutations, informed parties could be expected to prefer parallel mediation provided there is full cooperation between mediator and arbitrator. The chapter argues that the relative benefits of the use of dual-role neutrals would be greatly outweighed by the costs in fairness and efficiency, and the inevitable need for a sub-optimal design of either or both dispute processes. The benefits would also be separately outweighed by the risks of significant disruption to any ensuing arbitration if a dual-role neutral fails to achieve a settlement.


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