in order to investigate the response of cotton cultivars (gossypium hirsutum l.) to conventional-cropping and double-cropping systems a field experiment was conducted as split plot based on randomized completely block design with three replications at gonabad agriculture and natural resources research station during growing season of 2009-2010. the treatments included of recommended planting da...

Wheat Triticum aestivum L. is one of the most important agricultural products, and meets highest nutritional needs humans in various countries. This study aims to evaluate compatibility stability 25 wheat genotypes for two crop years five regions (Karaj, Qazvin, Isfahan, Varamin Damavand) a randomized complete block design with three replications. The results variance analysis additive main eff...

One of the crucial issues in developing nations is diminishing yield gaps. Therefore, accurate gap estimation has many real-world uses for increasing crop production. Utilizing comparative performance analysis (CPA) techniques, wheat fields was evaluated this study. In Varamin, Tehran Province, Iran, data on 104 were collected between 2018 and 2020 every aspect field management been documented....

Measuring sensitivity of hydraulic structures is considered as an approach for evaluation of water projects performance, due to lower distribution efficiency in Irrigation and Drainage project schemes. Sensitivity analysis approach for irrigation structures is one of flow analysis methods which are developed in recent years in order to measure the behavior of flow in hydraulic structures in an ...

The present study applies the model of American Meteorological Society-Environmental Protection Agency Regulatory Model (AERMOD) to investigate NO2 emissions from Besat thermal power plant, which is fuelled by natural gas to function. Results indicate that the simulated concentration of NO2 based on AERMOD, does not exceed NO2 concentration limit, set by the Iranian Ambient Air Quality Standard...

in this research by taking advantage of degradtion model ina grid system an area of 9222 km in eastern part of tehran province including eslam shahr , rey , varamin , damavand , and firooz kooh were studied . the results show that 43.8 % of the area , due to its natural condition , is not suitable for development. the rest of the area ( 42.5) due to the degradation caused by man's activiti...