Document Type : Research Paper
Authors
1 Department of Agriculture Economics and Extension, University of Kabul, Kabul, Afghanistan.
2 Department of Agricultural Economics, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
3 Department of Agricultural Economics, Faculty of Agriculture, University of Tehran, Karaj, Iran.
4 Department of Nature Engineering, Shirvan Faculty of Agriculture, University of Bojnord, Shirvan, Iran.
Abstract
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