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

In 2020, this research has been devoted to the determination of energy indicators and economic analysis in the vineyards of Qazvin province, after calculating the amount of energy consumption and economic indicators, optimization was done using the method of data envelopment analysis. According to the results, the energy ratio of grapes was estimated as 9.66 and 11.26 in traditional and semi-mechanized methods, respectively. Also, the economic results showed that the net profit of one ton of grapes in the traditional and semi-mechanized method was 2609.77 and 2995.22 dollars per hectare, respectively. The data coverage analysis method showed that the average scores of technical efficiency, pure technical efficiency, and scale efficiency for traditional grape production are 0.90, 0.95, and 0.94 respectively. Also, the average scores of technical efficiency, pure technical efficiency, and scale efficiency for semi-mechanized grape production are 0.91, 0.97, and 0.93, respectively. Based on the results of optimal consumption, it has led to a 25.19% reduction in the energy consumption of traditional production and a 24.78% reduction in the energy consumption of semi-mechanized grape production. According to the results, the high energy consumption of chemical fertilizers should be directed towards organic agriculture and less use of chemical fertilizers and pesticides as as possible. Also, it is suggested that optimal energy consumption and saving at the level of farmers should be advertised and promoted by the relevant bodies.

Complex management of water resources requires the application of a different perspective technical, economic, environmental and social that it requires considering the needs of all beneficiaries. The main objective of this study is to introduce hydro-economic model and modeling it in one of the country's catchment for analyzing water resources management policies. For this purpose, climatic and meteorological data and also interviews and questionnaires completed by farmer's Neyshabur catchment were used. Hydro-economic modeling composed of two main parts: hydrologic and economic. WEAP model was used in hydrological sector and regional (spatial) positive programming was used in economical sector. Strategies used in this study consists of three main scenarios were considered reducing the availability of water resources in agriculture that their impact on cropping pattern and then change the crop pattern on water resources were examined. The results of economic sector in hydro-economic model showed that most affected by the implementation of various policy scenarios is related to the first region, so that the cultivation levels was decreased about 13.4 percent in first scenario, 20.59 percent in second scenario and 29.11 percent in third scenario. In hydrologic sector of hydro-economic model, changes in cropping pattern on consumption of water resources based on different scenarios were simulated using WEAP model. The results showed that the greatest impact on reducing water consumption was related to the third scenario that the main reason for the change is reducing the area under cultivation of various crops. Also implementation of various scenarios on water allocation between the main applicants influenced water and causing the unmet supply reduced in three sectors of agriculture, industry and drinking in the years 2013-2035.

In the present study first the behavioral patterns of precipitation climatic variable were investigated during years 1985-2013 in the watersheds of Shahrood. Then, a biophysical- economic modeling system was used to analyse the effects of climate change resulting from reduced rainfall on available water resources, agricultural products and economic indicators of gross profit and water value under different scenarios (mild, medium, and intense climate change). The modeling system includes the products yield function based on rainfall (biophysical part of model) and positive mathematical programming approach (economic part of model) that was solved in consecutive three stages and in the GAMS software. The behavioral pattern of precipitation showed that this climate variable was reduced in the watersheds of Shahrood after year 2006. The results of proposed model also showed that with occurrence the climate change resulting from reduced rainfall the available water resources, total acreage of water crops and farmer's gross profit decrease and economic value of irrigation water increase in watersheds of Shahrood. The highest reduction in available water resources was the amount of 30.03 million cubic meters that was achieved under intense climate change scenario. Finally, utilizing deficit irrigation techniques, determination the rate of water charge to farmers on the basis of equality consideration, providing financing convenience to farmers for farms outfit to new irrigation system and fallow-lands was proposed to contrast with the effects of climate change resulting from reduced rainfall and protection of water resources in the region.

This paper attempts to measure the technical، allocative and economic efficiency and productivity of irrigated watermelon growers of 12 provinces of the country using non-parametric method of data envelopment analysis (DEA) and Malmquist index for the years of 2005-2010. For this purpose، the input-based method was used with three inputs and one output. The results showed that the average technical، allocative and economic efficiency of irrigated watermelon growers of the provinces of the country was 79. 4 percent for the years of 2005-2010. The average allocative and economic efficiency were 75. 9 and 61. 5 percent، respectively. This suggests that the irrigated watermelon growers have not the appropriate level of the mentioned performances in the selected provinces of the country. The calculation of efficiency of the selected provinces shows that four provinces experienced a ppositive growth on average and other provinces experienced negative growth on average during the years of 2005-2010. So that by study of provincial productivity ranking، it was observed that the provinces of Sistan and Baluchistan and Hamadan had the highest and the lowest productivity in the production of irrigated watermelon compared to other provinces، On the other hand، the productivity values of provinces showed that the appropriate productivity of the selected provinces was mostly due to the changes in technical efficiency.

The economic and population growth in Iran has been resulted in conversion of agricultural lands to urban and industrial uses. This paper attempts to estimate the environmental and economic value of agricultural lands which has been converted to industrial and residential use. The results indicate that the environmental value of per hectare paddy is about 310 million rials each year in Mazandaran Province. Whereas، production value of land was about 120 million rials. Comparing these figures، it would be suggested that in a cost and profit analysis of land the opportunity cost of land use change also should be considered.

Abstract The high honey nutritional value, more than 60 thousand honey producers, first production ranked in the Middle East and thirteen in the world, are the importance of honey production in Iran. The purpose of this paper is to determine the efficiency of honey production and its relationship with the hive numbers in Mazanderan province. Data is collected from the 50 producers by random sampling in 2010. According to results more unites is inefficiencies and the average efficiency is calculated about 80% and the lowest is about 60 percent. The results indicate the efficiency of different units is high. Determining effective of size on efficiency indicate that there are a”U” relationship between efficiency and size. The optimum number of beehives is 407 in every apiary that according to finding, about 84% of beekeepers are less than the above suggested record, therefore it is recommended that policies are concentrated toward larger units.

In this study, in addition to estimating meat demand, live animal supply and marketing services supply for beef and lamb, economic behavior of marketing margin with respect to determinants of meat demand, live animal supply and marketing services supply have been evaluated for years 1998-2004. Results indicate that, as examples, beef and lamb marketing margin elasticity with respect to feed prices are 0.037 and 0.032, respectively. Also, existing of market power in beef and lamb marketing process have increased in their marketing margins. Thereby, by making competition in related market to beef and lamb markets, beef and lamb marketing margin behavior reflect their marginal cost in their marketing process. JEL Classification: D4, L1, Q1, Q13, Q22