جستجوی مقالات مرتبط با کلیدواژه « ارزیابی اقتصادی » در نشریات گروه « اقتصاد کشاورزی »

Potato is one of the major food products in Afghanistan, ranking third after wheat and rice. Accordingly, this study focused on the economic evaluation of potato production in Khenjan County during the 2022-2023 cropping year. In the first place, economic evaluation indicators such as total income, total cost, gross return, profit, return on investment, benefit-cost ratio, and the total product price were analyzed. The optimal level of input usage was also determined through the production function.  The results showed that the average potato yield was 7334 kg per hectare, with an average income of 154,267 Afghanis, a production cost of 65,228 Afghanis, an average profit of 75,058 Afghanis, and a return-on-investment rate of 134.45 percent per hectare. The income-to-cost ratio indicates that an average income of 2.34 Afghanis was generated for every Afghanis spent on potato production. The average total price of potato per Kg was 9.36 Afghanis. The production function results revealed that most of the coefficients were significant, with land, phosphate fertilizer, nitrogen fertilizer, seed, labor, fungicide and machinery, having a positive effect on production while water having a negative effect. Overall, potato cultivation in the Khenjan district is profitable, and the optimal use of inputs except for water is recommended.  It should be focused on creating storage facilities to reduce seed prices, increasing loan facilities to encourage potato cultivation, optimizing water use, providing suitable labor facilities, and focusing on marketing to increase sales and profitability in potato production.

In order to economical assessment of transplanting compared with direct (conventional) cultivation of rapeseed (Ahmadi variety) as check in different sowing dates, this research carried out in farm of Kermanshah agriculture and natural resources research and education center and Seed and plant improvement institute in Karaj during 2018 and 2019. Treatments of this experiment included rapeseed cultivation in 7 October as control, transplanting in two and four leaf stage on 17 October, 1 November and 11 November. In this study, for getting to economic target used Partial Budgeting Technique and Benefit cost ratio. According to the results, in Alborz and Kermanshah provinces, the mean of grain yield of rapeseed in seed cultivation in 7 October was 3495 and 4857 kg.ha-1, respectively. In Kermanshah province to Alborz province, the mean of grain yield and net income of check treatment during experimental years was increased 39 and 72.2 percent, respevtively and Net present value check treatment with discount rate 20% was increased 78.9 percent. Comparing trnsplanting treatments in target regions, transplanting planting in Alborz province to Kermanshah was more profitable. Thus,in terms of crops and economic preference, rapeseed cultivation in 7 October treatment as check treatment was selected as the best treatments in target provinces.

Wetland services include recreational use, harvested meat (as direct consumption values) and carbon sequestration, oxygen production, water conservation and soil conservation (as indirect consumption values). In addition to use values, wetlands have other values; these values are the sums that individuals are willing to pay to protect wetlands for future use, for future generations to enjoy them, and for their mere existence. In this paper, the value of goods and services of Hamoon Wetland ecosystem in Sistan region in the form of information functions (recreational and protective values) in 2019 has been estimated. The information needed to estimate the value of these functions was collected using a questionnaire. Recreational and conservation values of Hamoon wetland as the recreational value of forest ecosystem of Hamoon wetland, was collected by collecting information from 350 people randomly in the villages around the wetland and the conditional valuation method. Based on the obtained results, the value of recreational and protective functions of Hamoon Wetland was estimated at 629.82 million Rials and 644.2 billion Rials, respectively. In case of collecting fees from visitors in order to use the recreational function of the wetland and its cost to maintain the wetland, it is possible to develop and preserve its existing values.

Changes in land use is an approach that is considered all around the world recently. This approach has been considered in some parts of the country especially western areas of Mazandaran Province, and due to its nature, it may cause some threats or benefits. Thus, the objective of this research was economic evaluation of converting rice paddies into citrus orchards. Quantitative data gathering techniques using questionnaire and interview was used to gather data. Research population included orchardists and rice growers of Northern Roudpey of Sari County that about 80 ones of them were selected as research sample using Brtlet Sampling Table. Net present value and benefit- cost ratio techniques were used for economic evaluation of the supposed agricultural activities. The results showed that both of them have economic justification, but the citrus orchards are more profitable. Therefore, based on the results of this study, it is recommended to convert rice paddies to citrus orchards of course in a gradual process and with precision administration and control of related organizations such as Jihad-e-Agriculture.

Today, there is no doubt that the definitive solution to many of the country's problems is a production boom, and this requires that market, technical, financial, and economic considerations be considered before starting a business. The purpose of this study is to identify the context of production and study of justifiability of cultivation of button mushrooms in Ziaabad section of Qazvin province. The method of this research is mixed. Therefore, research data were first collected through library studies and semi-structured interviews with 28 manufacturers and distributors. Qualitative data were then translated into quantitative numbers. Based on this, financial and economic ratios were calculated. Then, it was found that the cultivation of button mushrooms in Qazvin province will not be a problem in terms of market and there will be a suitable consumer market for the product. Also, the tools and equipment needed to start a business and cultivation of button mushrooms can be easily provided from within the country. As a result, the implementation of this business plan is also technically justified. Then, with the data obtained from the interviews along with the economic evaluation indicators (NPV, IRR, B/C and POP), the business plan was examined in terms of profitability. All the results of the indicators showed that this business plan has a positive and acceptable profitability. Implementation of the Button Mushroom Cultivation Business Plan will create youth employment and further boost production in the region. Finally, recommendations and suggestions were provided to manufacturers and other researchers.

Considering the quantitative and qualitative limitations of water resources, determining economic value of waters can have a significant impact on water demand and consumption management. For determine the economic value of water, a mathematical model has been developed in this research. The AWPM has been applied for Soghan in Kerman Province, Iran and water prices for each product were obtained. The highest price obtained for water from pricing method based on the type of product in the region of Sughan is 47577 (Rls / m3) for pistachios and the lowest price is 683 (Rls / m3) for potato. Also, the results of model implementation showed that the price obtained for water from methods that estimate the price of water based on the type of product and considering the factors such as the area and volume of water are more than methods that do not include product types. The features of this model are the exact calculation of agricultural water prices, the flexibility of the model and the user friendly of the model. This model can be used as a rapid and accurate tool for of agricultural water prices calculation.

One of the most important Pishin dams dam catchment area in south-eastern Iranian province of Sistan-Baluchistan. This area has very low rainfall and evaporation is very high on the one hand and on the other hand with the increasing demand for urban, agricultural and industrial, faces a severe water stress. According to the reference scenario results in the allocation to the agricultural sector Bahu Kalat, drinking, unauthorized agriculture and the environment to approximately 29, 7, 8 and 30 million cubic meters respectively. In this scenario, only 2 450 hectares of land will be cultivated.

Introduction Sustainable use of groundwater resources has been a concern of the past half century. Although a number of countries for many years have considered this issue, in Iran despite experts warning in the past two decades, recently has been highly regarded, especially by public officials. The use of modern irrigation systems by improving water distribution at the level of the farm and reduce the outflow of water from plant availability, improve irrigation efficiency but these systems increase evaporation and transpiration, and even in the event of a reduction of extraction water from wells, may not be effective in balance of the groundwater resources. The government of Islamic Republic of Iran, yearly pay a lot of subsidies (85% of total cost), to increase irrigation efficiency by equipping traditional culture to new irrigation systems. It may increase irrigation efficiency but may not improve balance of the groundwater resources. However, increasing irrigation efficiency in the process of conveyance, distribution, and application of water, improve groundwater balance, and reduce energy consumption, but costs, benefits and its impacts on balance of the groundwater resources are various in each step. so, technical and economic effects of each step and determining the priority of them, were the objectives of this study.
Materials and Methods In order to carry out this study, five cities include Mashhad, Sabzevar, Neyshabour, Torbat-e-jam and Torbat-e-heidarieh were selected. These areas are located in Khorasan Razavi in north east of Iran with average annual rain 200-250 millimeter. The mathematical relationships between extracted water from underground and surface resources and transfer it to farms as well as water influence to groundwater source and the rate of consumption in the fields and orchards were simulated in the excel spreadsheet. Data were collected by using questionnaires and interviews with farmers in the study area in the crop year 2012-2013. Additional data were collected from government documents in ministry of agriculture, energy and regional office. A multi scenario was simulated include 1-Increase the conveyance and distribution efficiency, CDE, to 95 % via transform dirty channel into the pipe. 2-Substitute pressurized irrigation systems instead of traditional system.3-Combining scenario one and two together. 4- Increasing irrigation application efficiency, IAE, to 75% in modern system in scenario three. 5-Increasing irrigation application efficiency, IAE, to 85% in modern systems in scenario three. 6- Execute scenario one and increasing area of irrigation modern systems to dual of initial forecast (only in Sabzevar until 1.5times). These scenarios also evaluated economically. In economic evaluation, increase of yield, between 10-40 percent as 4 scenarios separately, and reduce energy subsidies include increase power price to 2 times, and three kinds of cost price of power was considered.
Results and Discussion Average of CDE were obtained various between 57-78% in study area. The share of agricultural activity in reduce of groundwater source was 20% and most of area was encountered with low irrigation in warm seasons until to 50%. The most impact in creating balance in groundwater resources belonged to increase of CDE by first scenario and was quite economical. The most reduction on groundwater deficit can happen by scenario 5. However, in Torbat-e-jam and Torbat-e-heidarieh, groundwater deficit will continue unless the culture areas are reduced. Increasing IAE, is more effective than developing culture area of the pressurized irrigation systems, CAPIS, for example, in Sabzvar, increasing of IAE by 12% (scenario four), will reduce groundwater deficit 164% but increasing CAPIS, to 50%( scenario 6), will reduce groundwater deficit only 113%. Increasing CAPIS, with 30% increase in yield, make scenario three economical, but increase electrical energy and so, increase national cost by increasing subsidy of energy. First scenario, reduce consumption of electric power, so its benefit cost ratio will increase because reduce government cost but scenario two, increase consumed electrical energy. In the Sabzevar city power consumption in the first scenario was more than 176 million Kilowatt, which reduces farmer's spending by more than 23 billion IRR, But in the second scenario, energy consumption is rising by more than 25 million kilowatts. So, its benefit cost ratio will decrease if government reduce power subsidy. As a result, this scenario without increase of IAE and yield, will not be economical. In all city except Sabzevar with the increasing yield by 20 percent, all scenarios will be economical, also in all city, with omission of the power subsidy, scenario 2 will be uneconomical, so the government is forced to grant subsidies to expand new irrigation systems. The city of Sabzevar, which has the longest route for pipelines (about 42%), requires an initial investment of 695 billion rials, with investment of 1079 billion IRR needed to equip 15342 hectares of land to modern systems. Therefore, the first scenario, although having more economic benefits, requires a relatively small amount of investment as well. Regarding the energy cost of between 680 and 7300 Rls, a number of government payments with the implementation of the first scenario is reduced from 96 to 1263 billion rials yearly, while the total initial capital required to realization of the goal is 695 billion rials, which is estimated at 70 billion rials, annually.
Replacing the irrigation modern systems instead of traditional systems without reducing the gap between the current and potential IAE, had a little impact on the groundwater balance, and to consider energy subsidies, is in conflict to national benefits.
Conclusions Installation of volumetric meters and tubing for water transmission and distribution channels should be used in preference to increase the efficiency of irrigation, reduce energy consumption and water extraction from wells, protection of saving water, and prevention of increase in cultivation. In order to increase the water application efficiency and production, implementation of modern irrigation systems on farms and gardens should be accompanied by adequate supervision and training.

In this study, three irrigation methods, namely, clouding tape, sprinkler and furrow in Rozveh Agricultural Research station (Fereidan Region in Isfahan) were evaluated. This study was conducted as randomized complete blocks design as a split-split strip plot layout with three replication during two years. Three irrigation systems were considered as main plots, two planting methods (one- row planting and two-row planting) as split subplots and two potato cultivars (Marfuna and Agria) as split-split subplots. Significant difference way observed between irrigation method treatments and planting method by analyzing two years results. Results of the 1st year showed the advantage of production mean in sprinkler and tape methods comparing to furrow method while the second year results showed the advantage of sprinkler method to tape method and tape method to furrow method. Comparison of yield mean of cultivars indicated that although Agria cultivar was preferred to Marfona cultivar in the 1st year, two year comparison of yield mean showed no significant difference between Agria and Marfuna cultivars with yield means of 24083 kg. and 23233 kg., respectively. The two year comparison results of yield means using different planting methods indicated that one row planting with mean yield of 24839 kg. was preferred significantly compare to two row planting with mean yield of 22927kg.. One row planting showed significant preference in the 1st and 2nd year. Two year interaction effect of treatments showed that, except cultivar × year source, other interaction effects were not significant. Tape irrigation led to highest mean of WUE equal to 4.92 kg/m3. Economic evaluation of the project was carried out using benefit -cost ratio and present value of net benefits. The results indicated that sprinkler system was more beneficial. Tape and furrow methods for potato planting stood in the next place.

Iranian government persuades farmers to modernize their irrigation system by granting credit and subsidies. The objective of this research was to study economic aspects of accepting drip irrigation by farmers in Fars province. The data were collected from a sample of 140 orchard owners in three selected townships in 2005.Partial budgeting and project analysis methods were used. The finding of the study revealed that 62 percent of orchards had positive net present value. The results of partial budgeting analysis showed the positive impact of the new technology on cultivated area, yields and decreasing costs. Major problems of the system were pipe congestion, lower quality of pipes and initial investment Burdon. Finally, some recommendations are made to improve the situation through more emphasis on supervision and extension services.