List of Articles Open Access Article Abstract Page Full-Text 1 - Modeling and analysis of mechanical components for tractors, two-wheel cultivator using the finite element method and software solid works simulation Open Access Article Abstract Page Full-Text 2 - Determine the number of working days suitable for spraying wheat fields in Qazvin province Open Access Article Abstract Page Full-Text 3 - Evaluate energy measures in poultry management using data envelopment analysis (study Alborz Province) Open Access Article Abstract Page Full-Text 4 - Design, Construction and Evaluation of a system for measuring the actual cutting width of cylindrical mower by ultrasonic sensors Open Access Article Abstract Page Full-Text 5 - Design and construction of ambiance parameters measuring and Control system in poultry Open Access Article Abstract Page Full-Text 6 - Determining the probability of proper work days for operations of sewing corn in Qazvin Province