جستجوی مقالات مرتبط با کلیدواژه "شهرستان دزفول" در نشریات گروه "اکولوژی"

The purpose of this study was to evaluate the effects of adoption conservation tillage technology on the incidence and probability of technical efficiency.

To achieve the research goal, Heckman two-step model was used. The applied cross sectional data cover the growing season of 2015-16. the data were collected through completing questionnaires from a sample of 168 wheat growers in Dezful county who were selected by multistage random cluster sampling method.

The results of financial analysis showed that conservation tillage increases yield and gross profit per hectare by 20.22% and 21.44%, respectively compared to conventional tillage proceders. The average technical efficiency of the selected farmers is 0.78. Also, the results indicated that in terms of production and management technology, the technical efficiency difference between the most efficient and inefficient producer is 0.43. Furthermore, It is found that technology adoption of conservation tillage, ratio of available cultivation machines of conservation tillage in each village, growing experience water use and education level have significant effects and Labor and distance from village variables have negative and significant effect on technical efficiency of farmers. The conservation tillage adoption with a marginal effect of 0.48 showed the highest effect on the technical efficiency. The results also showed that farmers who use conservation tillage technologies are expected to be more efficient by 0.35, on average.

Adoption of conservation tillage technology and providing the relevant machines will increase the possibility higher technical efficiency. Regarding that conservation tillage is more beneficial compared to the conventional one and that there is a positive and significant relationship between adoption of conservation tillage and technical efficiency of wheat growers, farmers should be encouraged to adopt conservative technology through enhancing farmers' knowledge and awareness of the benefits of conservation method and increasing the provision of facilities to farmers.

Life Cycle Assessment (LCA) is an approach to study the environmental impacts of product production or activities that are calculated based on two indicators of resource consumption and emissions. This study aims to investigate the environmental effects of the production of Bell pepper using The Life Cycle Assessment Technique was conducted during the years 2011-2017. The first information was obtained through the organization of Jihad-e-Agriculture and interviews and interviews from 260 statistical population with 152 farmers who were determined by the Cochran formula in Dezful In order to analyze environmental impacts, the ISO 14040 method was used for a functional unit equivalent to one ton of Bell pepper. The global warming, acidity, evacuation of water resources, fossil, phosphate and potassium comprise six groups of studied effect. The results showed that CO2 and NH3 pollutants in the form of groups of effect of global warming and acidity in the Bell pepper culture system had the highest effect. The values ​​of environmental index (EcoX) and resource depletion index (RDI) were calculated 0.0492 and 0.4806, respectively. The effects of sensitivity and phosphate discharging sources respectively have the highest potential for environmental damage in the group of environmental impacts and Evacuated resources. Therefore, management of the use of urea fertilizer and the replacement of some of it with organic and non-chemical resources in agricultural indigenous peoples in order to reduce the environmental pollution of Iran is indispensable and inevitable.

Water management particularly in agricultural sector has been shown as an extensive debate which primarily depends on the holistic assessment of water resources combined with due attention to other involved aspects. Therefore, to address this issue a holistic way was regarded which crystalized in development of the Agricultural Water Poverty Index. . In line with this, a survey study was conducted to measure the agricultural water poverty in Dezful County. The study population consisted of all the irrigated wheat growers located throughout the County (N=5000). Using a systematic random sampling method a sample of 205 farmers based on Krejcie & Morgan table was selected. The main data was collected using a questionnaire and some other data including farms’ geographic information and water EC were gathered using GPS and Ecmeter devices, respectively. The validity of the study questionnaire was confirmed by a panel of experts.. Data Analysis was carried on by using a combination of software including SPSSv20, Super Decisions, and ArcGIS. Hence, the indicators of the index were weighted based on an analytical network process. After that, the agricultural water poverty was calculated for individual respondent farmers using a special formula. Results revealed that the causes of water poverty included the low farmers’ capacity to optimum water usage, low value of the environment component as well as the low rate of access to available water among farmers. Moreover, surface water resources (35.25), farmer’s access (51.85), human capital (40.67), and chemical herb-pesticides (90.74) ranked at first place among the other sub-components of resources, access, capacity, and environment, respectively. To recognize the hotspots dealt with water poverty, an agricultural water poverty map was provided. This map was regarded as a useful tool to reveal the water poverty causes in the study area. The study followed on the conclusion part in which the AWPI was regarded as an efficient and helpful tool to diagnose the water problems and to develop the appropriate policies and plans by decision and policy makers.