Cost-benefit Research Articles

Distributional Impacts of Tobacco Excise Taxes in Serbia.

Numerous studies worldwide have investigated the impact of tobacco tax increase on household welfare, focusing on concerns regarding potential tobacco taxation regressivity and its effects on the poorest, whereas their scope was limited to the working population. To explore the effects of tax changes on household budgets, accounting for the retired population as well, we employed the modified Extended Cost-Benefit Analysis (ECBA) framework, assuming a 43.6% specific tax increase that fits the EU Tobacco Tax Directive recommendation of minimum EUR 90 excise taxes per 1,000 cigarettes. Our analysis encompassed changes in: 1) tobacco expenditure (accounting for price elasticities by income groups: low-, middle-, and high-income), 2) medical costs linked to smoking-related diseases (utilizing relative risk of morbidity/mortality and smoking-attributable fractions), 3) years of working life (considering the years of working life lost among the working population), and 4) years of pension receipt (accounting for the years of retirement life lost due the premature death). Under an assumed specific excise increase leading to a 22.4% retail tobacco price rise, the net gains in disposable household budgets would be 0.01% for high-income, 1.3% for middle-income, and 2.9% for low-income households. A tax increase would yield a progressive effect on income distribution, benefiting the most economically disadvantaged population thereby contributing to a more equitable income distribution. To effectively reduce tobacco consumption, subsequent smoking-related medical costs, and associated productivity and pension losses, it is recommended that Serbia implement a minimum 43.6% increase in the specific tobacco excise tax.

Enhancing water efficiency programming in the City of Calgary

ABSTRACT This article presents the steps undertaken in a two-phase study to enhance the City of Calgary's (the City) water efficiency programming for indoor and outdoor industrial, commercial, and institutional (ICI) customers and outdoor residential customers. Study objectives included evaluating programs in other urban jurisdictions for suitability to Calgary, and developing short-, medium-, and long-term recommendations for water efficiency programming for the City. Phase I of the study included a literature review of Calgary's water consumption trends and explored over 150 water efficiency programs implemented across jurisdictions in North America, identifying a subset of 33 programs for further evaluation. Phase II evaluated program options through an integrated assessment, including gap, Strengths, Weaknesses, Opportunities, and Threats, and cost-benefit analysis. An implementation strategy was developed for seven water efficiency programs, grouped into complementary bundles of indoor and outdoor ICI and residential landscape transformation programs. The study also identified areas for further research, and key supporting elements or ‘success factors’ for water efficiency programming in the City. This article adds value to the discussion on approaches to select suitable indoor and outdoor ICI and outdoor residential water efficiency programs, and aids in informing the City's current and future strategic water planning and programs.

Evaluation of Sponge Gourd (Luffa cylindrica) Hybrids in Prayagraj Agro-Climatic Condition

An experiment was conducted to study the Evaluation of Sponge gourd (Luffa cylindrica) Hybrids in Prayagraj agro-climatic condition. at Sam Higginbottom. University of Agriculture Technology and Sciences, Prayagraj during summer 2023. From the present investigation it is concluded that the H10 Performed best in terms of growth (vine length (170.67 cm). The H9 is best performed in terms of Number of Primary branches (15.25) and The H10 is best performed in terms of maximum Number of node/plant (34.42).The treatment H4 is best performed in terms of Days to emergence of 1st male flower (42.83 days) and H11 is best performed in terms of days to emergence of 1st female flower/plant (46.8 days).The treatment H7 is best performed in terms of first appearance of male flower (2.17). The treatment H7 is best performed in terms of first appearance of female flower (2.17).The H3 and H5 is best performed in terms of Days to 50% female flower/plant (45.67).the treatment H12 performed best in term of days to 1st fruit setting/plant (48.00 Days) and the T12 best performed in terms of Number of days to first Fruit picking (51.58 Days). ). The H1 is best performed in terms of maximum number of Number of fruit/plant (28.48 Fruit),Fruit yield /plant (kg) (2.70 Kg), Fruit yield /ha (Q) (270 Q) and average weight of fruit (95.00g).The H4,H5 and H6 performed best in term of Fruit length (30.00cm). The treatment H11 is best performed in terms of fruit diameter (22.00mm). Whereas, the H1 recorded highest benefit cost ratio (2.79).

Analysis of the Environmental Benefits and Driving Forces of the Development of the “Production–Living–Ecological Space” Pattern Based on the ERI-ESV Geodetector

Based on five periods of Landsat remote sensing data from 1980 to 2020, this study constructs a landscape ecological risk-ecosystem service value evaluation model and integrates it with a geodetector model to analyse the environmental benefits of the development of the “production–living–ecological space” pattern and its driving factors in the Xuzhou planning area. The results of the study are as follows: (1) Over the past 40 years, the expansion of living spaces has significantly encroached upon adjacent agricultural production areas and ecological spaces, such as forests and grasslands. Specifically, the areas of agricultural land, forests, and grassland have been diminished by 277.39 km2, 23.8 km2 and 12.93 km2, respectively; in contrast, urban and rural living spaces have increased by 238.62 km2 and 58.92 km2, alongside a rise in industrial production areas, water bodies, and other ecological spaces. (2) Throughout the 40-year period, both the landscape ecological risk (ERI) and ecosystem service value (ESV) in the study area have shown a decreasing trend. The proportion of high- and medium-high-risk areas of the ERI have decreased by 5.19% and 7.50%, respectively, while low, lower, and medium ecological risk areas have increased by 6.40%, 3.22% and 3.07%, respectively. In addition, low-ESV areas have increased by 14.22%, while the proportion of high- and medium-high-ESV areas have decreased by 1.16%. (3) There is a significant positive spatial correlation between the ERI and ESV. Regions with dense ecological spaces comprising forests, water bodies, and grasslands, particularly in the northeastern part of the Jiawang District and the southeastern part of the Tongshan District, demonstrate superior regional ecosystem service quality. The ERI and ESV are dominated by “high–high” and “low–high” aggregation. Conversely, in the southwestern part of the study area, the expansion of living space has led to the transformation of some agricultural land, forest land, and grassland into less risky construction land, resulting in a decline in the quality of regional ecosystem services. The local spatial correlation between the ERI and ESV changed from “high–high”, “low–low”, “low–high” agglomeration to “low–low” agglomeration. (4) Key factors influencing the spatial differentiation of the “production–living–ecological space” include the GDP, population density, soil type, and the distance to towns and roads. Among these, the interaction between population density and soil type has the most significant effect on the changes in the pattern of the “production–living–ecological space”.

Cluster Front Line Demonstrations on New Chickpea Varieties in Western Parts of Kurnool District of Andhra Pradesh

Background: Cluster Front Line Demonstrations were conducted to study the comparative performance of new chickpea varieties in the western parts of Kurnool district, Andhra Pradesh. These demonstrations were conducted at twenty five locations during the Rabi season of two consecutive years (2019-20 and 2020-21). Methods: Three improved chickpea varieties (Nandyal Gram-3, Nandyal Gram-49 and Nandyal Gram-452) were selected to implement these demonstrations and the improved varieties were compared with the locally grown JG-11 variety. Result: During two years of assessment, the pooled results revealed that the highest mean number of pods (51.3) per plant and average pod yield (2234 kg ha-1) were recorded in Nandyal Gram-452 compared to local variety JG-11 (41.2 pods per plant; 1862 kg ha-1). The lowest incidence of fusarium wilt was recorded in Nandyal Gram 452 (6.14%) followed by Nandyal Gram 49 (9.73%) and Nandyal Gram 3 (12.04%) compared to JG-11 (15.83%). The lowest dry root rot was also observed with Nandyal Gram-452 variety (10.92%) compared to JG-11 (18.19%). The higher average net income (80486 Rs ha-1) and benefit cost ratio (2.9) were realized in the demonstration with the improved Nandyal Gram-452 variety in comparison to lower net income (58370Rs ha-1) and benefit cost ratio (2.3) with JG-11. These results clearly indicated that the improved chickpea variety Nandyal Gram 452 is the best alternative old variety JG-11 which is being cultivated since 2005.

Do farmers prefer result-based, hybrid or practice-based agri-environmental schemes?

Abstract This study examines farmers’ preferences for practice-based, result-based and hybrid agri-environmental schemes in three countries through a choice experiment conducted by the Organization for Economic Cooperation and Development, focusing on biodiversity, climate and water quality. The results reveal that, in general, farmers tend to prefer practice-based schemes for water quality or climate change mitigation goals over hybrid or result-based schemes. Moreover, the study indicates that only a limited number of hybrid schemes are both preferred by farmers and more socially beneficial compared to equivalent practice- or result-based schemes. These conclusions are further reinforced by a cost-benefit analysis.

Low Carbon Development Strategy in the Rambat Menduyung Mangrove Forest Area of West Bangka

Indonesia is committed to reducing carbon emissions through low-carbon development. Mangrove ecosystems have a high carbon storage value that can support this development. There is a problem of high mangrove degradation caused by economic activities. One of the sectors causing mangrove degradation is the mining sector in the province of Kepulauan Bangka Belitung. Low-carbon development strategies in mangrove areas are needed to support the increase of sustainable economic activities such as capture fisheries, aquaculture, and mangrove conservation. The objective of this research is to calculate the potential value of sustainable economic activities and develop a low-carbon development strategy in the Rambat Menduyung Mangrove Area. The methods used in this research are economic benefit analysis, benefit transfer analysis of carbon emission factors, and strategy analysis using interpretative structural modeling with Exsimpro software. The results of research suggest that potential economic activities that support low carbon development in mangrove areas, namely mangrove conservation, capture of marine biota, and blood clam production, produce economic benefits of IDR105,723,552,069/year. Prioritizing low-carbon development strategies by improving protection and law enforcement policies and increasing institutional capacity and community participation supported by adequate infrastructure from stakeholders, namely DKP West Bangka, KPHP Rambat Menduyung, and Belo Laut Village Government.

Low Carbon Development Strategy in the Rambat Menduyung Mangrove Forest Area of West Bangka

Indonesia is committed to reducing carbon emissions through low-carbon development. Mangrove ecosystems have a high carbon storage value that can support this development. There is a problem of high mangrove degradation caused by economic activities. One of the sectors causing mangrove degradation is the mining sector in the province of Kepulauan Bangka Belitung. Low-carbon development strategies in mangrove areas are needed to support the increase of sustainable economic activities such as capture fisheries, aquaculture, and mangrove conservation. The objective of this research is to calculate the potential value of sustainable economic activities and develop a low-carbon development strategy in the Rambat Menduyung Mangrove Area. The methods used in this research are economic benefit analysis, benefit transfer analysis of carbon emission factors, and strategy analysis using interpretative structural modeling with Exsimpro software. The results of research suggest that potential economic activities that support low carbon development in mangrove areas, namely mangrove conservation, capture of marine biota, and blood clam production, produce economic benefits of IDR105,723,552,069/year. Prioritizing low-carbon development strategies by improving protection and law enforcement policies and increasing institutional capacity and community participation supported by adequate infrastructure from stakeholders, namely DKP West Bangka, KPHP Rambat Menduyung, and Belo Laut Village Government.

Investigation of the pangas (Pangasianodon hypophthalmus) cultivation sustainability in cages at the Ratargul Freshwater Swamp Forest of Bangladesh

AbstractDetermining the most appropriate stocking density for a specific fish species in an ambient condition is essential for successful cage aquaculture in terms of profitability which is mainly governed by growth. The current study was conducted to ascertain which stocking density gives the best result of widely cultured species in cage aquaculture, pangas (Pangasianodon hypophthalmus), at swamp forest environment of Ratargul Freshwater Swamp Forest, Bangladesh in terms of growth, production and economic return. Fish were reared for 93 days at three stocking densities, namely 30, 40 and 50 fish/m3 which were denoted as FSD30, FSD40 and FSD50, respectively, containing three replications of each. Growth and yield comparisons indicated that the stocking density of fish had significant (p < 0.05) effects on growth rate and productivity. Fish cultivated at the maximum density (FSD50) had lower mean weights than fish reared at lower densities. The significantly highest mean weights (376.58 ± 14.65 g) and benefit–cost ratio (BCR) (1.617 ± 0.035) obtained from FSD30 show the suitability of this density in terms of fish growth and profitability of pangas in swamp forest environment.

Effect of biological and chemical application for the control of the red spot vector in banana (Musa paradisiaca L.) crops

The aim of the research was to evaluate the effect of biological and chemical application for the control of the red spot vector in banana (Musa paradisiaca L.). The experimental design was randomized complete blocks (RCB), composed of three treatments, each with 20 experimental units or banana plants. The study was based on two types of red spot control, being chemical control and biologicalcontrol, as well as a referential control. Bowties impregnated with the insecticides were used on the banana bunches. The use of chlorpyrifos was used as chemical control, while for biologicalcontrol a commercial product based on Metarhizium anisopliae 1x109 strains was applied. The study variables were: number of hands, length of fingers, incidence of red spot, percentage of damage, bunch weight, crop yield and cost benefit analysis. The data were statistically evaluated using the analysis of variance and the comparison of measures was carried out using the Tukey test at 5% probability. The results show that there are no significant differences between the treatments that control the red spot of the banana fruit, obtaining 796 boxes of bananas from the chemical control and 787 boxes of bananas from the biologicalcontrol, in the same way the profitability was higher $ 2.24 and $ 2,19 respectively.

Treating Mycoplasma genitalium (in pregnancy): a social and reproductive justice concern.

Antimicrobial Resistance is a threat to individual and to population health and to future generations, requiring "collective sacrifices" in order to preserve antibiotic efficacy. 'Who should make the sacrifices?' and 'Who will most likely make them?' are ethical concerns posited as potentially manageable through Antimicrobial Stewardship. Antimicrobial stewardship almost inevitably involves a form of clinical cost-benefit analysis that assesses the possible effects of antibiotics to treat a diagnosed infection in a particular patient. However, this process rarely accounts properly for patients - above and beyond assessments of potential (non)compliance or adherence to care regimes. Drawing on a vignette of a pregnant woman of colour and migrant diagnosed with Mycoplasma genitalium, a sexually transmissible bacterium, this article draws out some of the ethical, speculative, and practical tensions and complexities involved in Antimicrobial Stewardship. We argue that patients also engage in a form of cost-benefit analysis influenced by experiences of reproductive and social (in)justice and comprising speculative variables - to anticipate future possibilities. These processes have the potential to have effects above and beyond the specific infection antimicrobial stewardship was activated to address. We contend that efforts to practice and research antimicrobial stewardship should accommodate and incorporate these variables and acknowledge the structures they emerge with(in), even if their components remain unknown. This would involve recognising that antimicrobial stewardship is intricately connected to other social justice issues such as immigration policy, economic justice, access to appropriate medical care, racism, etc.

Characterizing multi-pollutant emission impacts of sulfur reduction strategies from coal power plants

Fuel combustion for electricity generation emits a mix of health- and climate-relevant air emissions, with the potential for technology or fuel switching to impact multiple emissions together. While there has been extensive research on the co-benefits of climate policies on air quality improvements, few studies have quantified the effect of air pollution controls on carbon emissions. Here we evaluate three multi-pollutant emission reduction strategies, focused on sulfur dioxide (SO2) controls in the electricity sector. Traditional ‘add-on’ pollution controls like flue gas desulfurization (FGD) reduce SO2 emissions from coal combustion but increase emissions of nitrogen oxides (NO X ), volatile organic compounds (VOCs), fine particulate matter (PM2.5), and carbon dioxide (CO2) due to heat efficiency loss. Fuel switching from coal to natural gas and renewables potentially reduces all pollutants. We identified 135 electricity generation units (EGUs) without SO2 controls in the contiguous US in 2017 and quantified the unit-level emission changes using pollution control efficiencies, emission rates, fuel heat input, and electricity load. A cost-benefit analysis is conducted, considering pollution control costs, fuel costs, capital and operation and maintenance (O&M) costs, the monetized health benefits from avoided multi-pollutant, and the social cost of carbon as the benefit for carbon reduction. We find that add-on SO2 controls result in an average annual net benefit of $179.3 million (95% CI: $137.5-$221.0 million) per EGU, fuel switching from coal to natural gas, $432.7 million (95% CI: $366.4-$498.9 million) per EGU; and fuel switching from coal to renewable energy sources, $537.9 million (95% CI: $457.1-$618.9 million) per EGU. Our results highlight multi-pollutant emission reduction strategy as a cost-effective way to synergistically control air pollution and mitigate climate change.

Cost-benefit Tradeoff Mediates the Rule- to Memory-based Processing Transition during Practice.

Practice not only improves task performance, but also changes task execution from rule- to memory-based processing by incorporating experiences from practice. However, how and when this change occurs is unclear. We tested the hypothesis that strategy transition in task learning results from cost-benefit analysis. Participants learned two task sequences and were then queried about the task type at a cued sequence and position. Behavioral improvement with practice can be accounted for by a computational model implementing cost-benefit analysis. Model-predicted strategy transition points are related to behavioral slowing and changes in fMRI activation patterns in the dorsolateral prefrontal cortex. Strategy transition is also related to increased pattern separation in the ventromedial prefrontal cortex. The cost-benefit analysis model outperforms alternative models (e.g., both strategies racing for being expressed in behavior) in accounting for empirical data. These findings support cost-benefit analysis as a mechanism of practice-induced strategy shift.

Comparing Costs: Does Extreme Oncoplastic Breast-Conserving Surgery Confer a Cost Benefit When Compared with Mastectomy and Reconstruction?

Extreme oncoplastic breast-conserving surgery (eOBCS) describes the application of OBCS to patients who would otherwise need a mastectomy, and its safety has been previously described. We aimed to compare the costs of eOBCS and mastectomy. We reviewed our institutional database to identify breast cancer patients treated surgically from 2018 to 2023. We included patients with a large disease span (≥5cm) and multifocal/multicentric disease. Patients were grouped by their surgical approach, i.e. eOBCS or mastectomy. The direct costs of care were determined and compared; however, indirect costs were not included. Eighty-six patients met the inclusion criteria, 10 (11.6%) of whom underwent mastectomy and 76 (88.4%) who underwent eOBCS. Six mastectomy patients (60%) had reconstruction and 6 (60%) underwent external beam radiation therapy (EBRT). Reconstructions were completed in a staged fashion, and the mean cost of the index operation (mastectomy and tissue expander) was $17,816. These patients had one to three subsequent surgeries to complete their reconstruction, at a mean cost of $45,904. The mean cost of EBRT was $5542. Thirty-four eOBCS patients (44.7%) underwent 44 margin re-excisions, including 6 (7.9%) who underwent mastectomy. Sixty (78.9%) of the eOBCS patients had EBRT. The mean cost of their index operation was $6345; the mean cost of a re-excision was $3615; the mean cost of their mastectomies with reconstruction was $49,400; and the mean cost of EBRT was $6807. The cost of care for eOBCS patients remained lower than that for mastectomy patients, i.e. $17,318 versus $57,416. Mastectomy is associated with a lower cost than eOBCS, which had a low conversion rate compared with mastectomy.

Comparing Costs: Does Extreme Oncoplastic Breast-Conserving Surgery Confer a Cost Benefit When Compared with Mastectomy and Reconstruction?

Extreme oncoplastic breast-conserving surgery (eOBCS) describes the application of OBCS to patients who would otherwise need a mastectomy, and its safety has been previously described. We aimed to compare the costs of eOBCS and mastectomy. We reviewed our institutional database to identify breast cancer patients treated surgically from 2018 to 2023. We included patients with a large disease span (≥5cm) and multifocal/multicentric disease. Patients were grouped by their surgical approach, i.e. eOBCS or mastectomy. The direct costs of care were determined and compared; however, indirect costs were not included. Eighty-six patients met the inclusion criteria, 10 (11.6%) of whom underwent mastectomy and 76 (88.4%) who underwent eOBCS. Six mastectomy patients (60%) had reconstruction and 6 (60%) underwent external beam radiation therapy (EBRT). Reconstructions were completed in a staged fashion, and the mean cost of the index operation (mastectomy and tissue expander) was $17,816. These patients had one to three subsequent surgeries to complete their reconstruction, at a mean cost of $45,904. The mean cost of EBRT was $5542. Thirty-four eOBCS patients (44.7%) underwent 44 margin re-excisions, including 6 (7.9%) who underwent mastectomy. Sixty (78.9%) of the eOBCS patients had EBRT. The mean cost of their index operation was $6345; the mean cost of a re-excision was $3615; the mean cost of their mastectomies with reconstruction was $49,400; and the mean cost of EBRT was $6807. The cost of care for eOBCS patients remained lower than that for mastectomy patients, i.e. $17,318 versus $57,416. Mastectomy is associated with a lower cost than eOBCS, which had a low conversion rate compared with mastectomy.

Field Efficacy of Certain Chemicals and Neem Products against Shoot and Fruit Borer, Earias vittella (Fabricius.) on Okra in Prayagraj, U.P., India

A field trial was carried out at the research plot of the Department of Entomology at Central Research Field, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during autumn season of 2023. Seven treatments were replicated thrice in Randomized Block evaluated against Earias vittella viz. and also assessed their influences on the yield of okra (T1) Fipronil 5%SC @ 1 ml/lit, (T2) Spinosad 45%SC @1 ml/lit, (T3) Azadiractin 1%EC @ 3 ml/lit, (T4) Chlorantraniliprole 18.5%SC @ 0.3 ml/lit, (T5) Imidacloprid 17.8%SL @ 0.4 ml/lit, (T6) Emamectin benzoate 5%SG @ 0.3 ml/lit, (T7) NSKE 5% @50 ml/lit and (T0) Control. Each treatment was sprayed twice at 14 days interval. The observations of shoot and fruit infestation per plant were recorded one day before, 3rd, 7th and 14th day after each spray. The results revealed that all tested insecticides significantly reduced the pest infestation compared to untreated plot. The lowest percent infestation of shoot and fruit borer was observed in Chlorantraniliprole 18.5% SC (8.96%, 9.29%) and Spinosad45%SC (9.74%, 10.42%) followed by Imidacloprid 17.8% SL (10.58%, 11.04%) Emamectin benzoate 5%SG (11.89%, 12.27%), Fipronil 5% SC (12.46%, 13.09%), Azadiractin 1% EC (12.77%, 14.16%), NSKE 5% (13.42%, 14.63%). The mean crop yield ranged between 30 q/ha to 16 0q/ha, the highest was recorded in Chlorantraniliprole 18.5% SC (160 q/ha) followed by Spinosad 45% SC (154 q/ha).When cost benefit ratio worked out, the best and the most economic treatment was Chlorantraniliprole 18.5% SC (1:5.7) followed by Spinosad 45%SC (1:5.2), Imidacloprid 17.8% SL (1:5.1), Emamectin benzoate 5%SG (1:4.3), Fipronil 5%SC(1:3.9), Azadiractin 1% EC (1:3.0),NSKE 5% (1:2.5) and Untreated (1:1.18).

Cost–Benefit Analysis of International Financial Reporting Standard and Russian Accounting Standard Integration: What Does Comparability Cost?

In Russia, firms with consolidated financial statements must produce financial statements in both RAS (Russian accounting standards) and IFRS (international financial reporting standards). Unconsolidated SMEs are only required to use RAS. Using hand-collected data from 2010–2013 (pre- and post-IFRS adoption periods), we find income measures under RAS are converging to income measures under IFRS. The quality of earnings exhibits no change under IFRS, while RAS earnings are being managed upward for firms that have adopted IFRS and downward for firms that have not adopted IFRS. The relative variation in market and book values differs more widely under IFRS when compared to RAS, implying more volatility and risk under IFRS. We attribute our findings to a monitoring effect derived from IFRS.

Response of Blackgram (Vigna mungo L.) Cultivars for Nipping and Graded Levels of Nitrogen for Higher Productivity under Irrigated Conditions

Blackgram (Vigna mungo L.) holds significant importance among grain legumes, particularly in terms of its production and productivity. Over the years, the decline in the cultivation area of this crop has become increasingly evident due to its persistently low yields. Many technologies are being implemented to improve the yield, and nipping is one of them. The main objective of this paper was to standardize the nipping timing and graded levels of nitrogen (N) application on growth and seed yield in blackgram cultivars under irrigated conditions. A study with three blackgram cultivars (cv.), three levels of N, and three intervals of nipping was taken up during the winter and monsoon seasons of 2018 and 2019, respectively. The study revealed that blackgram cv. VBN8 recorded a higher plant height of 49.52 cm, a higher number of branches (4.08), a higher number of pods per plant (47.75), a higher seed yield of 882 kg.ha−1, and a benefit cost ratio (B:C ratio) of 2.49. Among the graded levels of nutrients, applications of 125% N and 100% phosphorus (P) and potassium (K) recorded the highest growth and yield attributes, with a B:C ratio of 2.33. Nipping at 25 days after sowing (DAS) registered a higher number of branches (4.08), more pods per plant (48.14), and a seed yield of 902 kg.ha−1 with a B:C ratio of 2.36. Higher N, P, and K uptake was observed in blackgram VBN8, with an application of 150% recommended N and 100% P and K and nipping at 25 DAS. To conclude, application of 125% recommended N and 100% P and K and nipping at 25 DAS were found to be significant in enhancing the productivity of blackgram and NPK uptake, and resulted in 14% more profit than no nipping treatments.

Economic life evaluation of reservoir dams based on comprehensive costs and benefits analysis considering potential dam breach: A case study of the Luhun reservoir in China

The scientific evaluation of a dam’s economic life is necessary to determine its management strategy rationally. However, most studies have mainly focused on analyzing the current economic characteristics of reservoir dams without considering their long-term development trend. And they have failed to incorporate the potential loss caused by dam breaches as one of the operating costs for dams. Consequently, this results in the inability to scientifically calculate the economic life of reservoir dam operations. Therefore, this study analyzed the factors influencing the economic life of reservoir dams in term of safety, costs, benefits and society, and established an economic life evaluation indicator system for reservoir dams. Based on the analyses of costs and benefits of reservoir dams, an economic life evaluation model for reservoir dams was constructed by comprehensively considering the impact of potential dam breaches and the social impact of reservoir dams on the production and lives of local residents. Moreover, based on economic theory, the economics of various types of management measures for reservoir dams and their impact on the economic life of dams were analyzed. The proposed model was applied to the Luhun Reservoir in Henan Province, China, to quantify the comprehensive costs and benefits of its operation for each year after 1990 s, analyze the trend of its “cost-benefit” relationship, and calculate its expected economic life. The results showed that when considering its own risks and social impacts, the expected economic life of the Luhun Reservoir was 74 years. The Luhun Reservoir is expected to operate up to its non-economic life span till 2039. Finally, suggestions for expanding the economic life of dams were proposed. Potential dam breach losses can significantly reduce the economic life of reservoir dams. And risk management measures for reservoir dams should be particularly strengthened during daily operations and management.

Spatial Synergy between Tourism Resources and Tourism Service Facilities in Mountainous Counties: A Case Study of Qimen, Huangshan, China

Under the influence of mountainous terrain, the spatial synergy between tourism resources and tourism service facilities has emerged as a pivotal factor affecting the overall efficiency enhancement of regional tourism destinations. In order to explore the synergistic effect of the two, taking Qimen County as the study site, this study utilizes Point of Interest (POI) data of tourism resources and tourism service facilities. It constructs a fine-scale multidimensional spatial synergy methodology based on grid vectorization to conduct scenario-based comparative analyses of altitude and population density. The objective is to elucidate the effects of fine-scale tourism development synergy and propose enhancement strategies. The findings are as follows: (1) The vertical zonation of mountains has led to a widespread, decentralized distribution of natural tourism resources in mid-to-high-altitude areas, while humanistic tourism resources in low-altitude urbanized areas exhibit a granular, clustered distribution. These contrasting scenarios manifest a polarization, making it difficult to achieve supply–demand matching of the layout pattern of tourism service facilities along transportation routes. (2) The spatial gradient effect of the synergy between the two in mountainous counties is significant, with a higher synergy level in core towns and obvious misalignment in peripheral areas. (3) Altitude and population density are critical factors influencing the supply of tourism service facilities. Through scale aggregation guidance and cost–benefit mechanisms, the spatial distribution can be classified, stratified, and optimized to better serve resource development. This study provides valuable insights into understanding laws governing development and utilization within mountainous county areas for academic research purposes.