فهرست مطالب محرم عین اللهی احمدآبادی

This research was carried out in Markazi province in order to study the comparative advantage of bean production. Required data were obtained in a survey research by interviewing with 167 bean producers in different regions of the province and filling in the pre-structured questionnaires during 2002-2003 crop year. Gathered data were analyzed using the EXCEL and SPSSWIN softwares. Comparative advantage was calculated using Domestic Resource Cost (DRC)، Social Cost Benefit (SCB) and Net Social Profitability (NSP) indicators using two absolute and relative Power Purchasing Parity (PPP) scenarios. In both scenarios، values of the DRC and SCB were calculated less than one and NSP was calculated greater than zero. Results indicated that Markazi province has comparative advantage for bean production.

In this research an experiment was carried out in order to obtain a suitable crop rotation for wheat and profitability improvement in rain-fed farms. The experiment included 7 treatments and 4 replicates based on Randomized Completely Block Design which was conducted in two different phases for 5 crop years starting from 1999-2000. In the first year and first phase، in the land that was under wheat cultivation in the last year، the following treatments were studied in the rain-fed station: wheat، fallow، chickpea، safflower، straw، lentil and sunflower. In the second phase، uniform cultivation of rain-fed wheat was used for performing the aforementioned treatments and continued until the last year of the experiment. So that locations of rotated crops were substituted for uniform rain-fed wheat cultivation every other year. Economic evaluation of the treatments using Marginal Benefit-Cost Analysis showed that chickpea-wheat treatment by producing total revenue and net profit respectively as mush as 3508910 and 2201520 Rials per hectare vs. total cost of 1307390 Rials per hectare is the most profitable treatment whereas safflower-wheat and wheat–wheat rotations are the second and the third priority، respectively. Therefore، it is recommended that farmers avoid from fallowing the land and utilize the rotations chickpea-wheat، safflower-wheat and even wheat-wheat rotation in their rain-fed farms، instead.

This research was carried out in Zanjan province in order to study the comparative advantage of bean production. Required data were obtained through a survey research by interviewing 54 bean producers in the main regions of bean production in the province and completing pre-structured questionnaires during 2002-2003 crop years. Comparative advantage was calculated using Domestic Resource Cost (DRC), Social Cost Benefit (SCB) and Net Social Profitability (NSP) indicators using two absolute and relative Power Purchasing Parity (PPP) scenarios. In both scenarios, values of the DRC and SCB were calculated to be less than one and NSP to be greater than zero. Results indicated that Zanjan province has comparative advantage in bean production. Therefore, it is suggested that bean production in Zanjan province should be targeted to support so that the bean producers be able to compete worldwide in planning to join the World Trade Organization (WTO).