List of Articles Agricultural inputs

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  1 - Investigation of environmental impacts of potato production using life cycle assessment
  Majid Dekamin EHSAN KHODAREZAEI
  10.30495/jest.2023.75041.5905
  Background and Objective: In recent years, the debate over the environmental sustainability of agricultural productions is increased widely. In this context, environmental impacts of potato production in the Hamadan province (the largest producer of potatoes in Iran) we More

  Background and Objective: In recent years, the debate over the environmental sustainability of agricultural productions is increased widely. In this context, environmental impacts of potato production in the Hamadan province (the largest producer of potatoes in Iran) were studied.Material and Methodology: In this research, life cycle assessment approach was used to identify and reduce environmental impacts. Data were collected by face to face interview with farmers in Nahavand (2020-2021). The CML IA method was selected to impact assessment. The environmental impact were assessed for impact categories including involved the global warming potential, depletion of fossil fuel resources potential, acidification potential, eutrophication potential and human toxicity potential. Producing one ton of potatoes was determined as a functional unit.Findings: The results showed that the production of one-ton potato consumes 1774.75 MJ energy. It emits 125.52 kg CO2eq, 5.04 kg SO2eq, 1.34 kg PO4eq, 69.4 kg 1,4-DBeq that respectively are involved the global warming potential, depletion of fossil fuel resources potential, acidification potential, eutrophication potential and human toxicity potential.Discussion and Conclusion: The analyses revealed that the production of chemical fertilizers and electricity had highest effects on global warming, depletion of fossil fuels and human toxicity. Also, direct emissions from the field because of nitrogen and phosphoric compound in fertilizers had highest effects on eutrophication and acidification. Manuscript profile
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  2 - The historical trend of changes in different sources of labor in the productivity of agricultural lands in Iran's wheat production ecosystems (1921-2020)
  شهلا Lajmorakramechari عبدالمجید Mahdavi damghani هومان Liaghati
  Traditional agricultural systems and conventional agriculture have major differences from each other. Among these differences, we can refer to the number and different sources of external inputs used to achieve the final production. One of these inputs is the labor issu More

  Traditional agricultural systems and conventional agriculture have major differences from each other. Among these differences, we can refer to the number and different sources of external inputs used to achieve the final production. One of these inputs is the labor issue in Iran's agricultural systems, especially wheat production. The workforce in these systems is provided from the source of human labor, livestock labor and mechanization. The present study was compiled in order to describe the resources used in the physical work that occurred in wheat production ecosystems in Iran and the changes in its cultivated area during a hundred years. For this purpose, the method of energy return on investment was used. The required data were collected from various sources such as the Iranian Statistics Center, the Information and Communication Technology Center of the Ministry of Agriculture, the FAO statistical database, and historical sources. The data were converted into Joules using conversion coefficients and finally, these time series were analyzed using Microsoft Excel 2007 and Minitab® 17.1.0 software. The results of the research indicate an increase in the area under wheat cultivation from an average of 1.5 million hectares at the beginning of the study period to an average of 6.5 million hectares. During this one-hundred-year time period, the final yield of wheat production systems as the amount of work input that has entered the system as an external input (EFEROI) has decreased 37%. Therefore, it is necessary to review and revise the design of labor supply sources for wheat production systems. Manuscript profile