to estimate the optimum and effective amount of nitrogen fertilizer for quantity and quality improvement of three new durum wheat lines, this research was conducted in gachsaran dry-land agricultural research station for a duration of 4 years (2003-2007). the study was performed as a factorial expriment, using a randomized complete block design with 4 replications. two factors of: 4 nitrogen ra...

A rock failure criterion is very important for prediction of the ultimate strength in rock mechanics and geotechnics; it is determined for rock mechanics studies in mining, civil, and oil wellborn drilling operations. Also shales are among the most difficult to treat formations. Therefore, in this research work, using the artificial neural network (ANN), a model was built to predict the ultimat...

development of new cultivars with high seed yield and desirable characteristics are major goals of lentil program for moderate and semi warm climate of iran. kimiya is a new lentil (lens cultivars medik) cultivar with high-yield, yield satability and adaptability to rainfed conditions. the iranian agricultural research, education and extension organization issued registration for kimiya on 9 au...

the objective of this research was to study genotype×environment interaction and to evaluate stability analysis of grain yield in chickpea genotypes under rainfed condition. experimental material was comprised of 17 genotypes with the experiments carried out in rcbd of four replications at kermanshah, lorestan, ilam, gachsaran and gorgan research stations during the two years of 2003-2004. the ...

an oil and gas well cementing in gachsaran formation, where sustained annular pressure has been reported in many wells, presents a big challenge in maroon field. the main challenges are preventing gas migration and achieving zonal isolation using a competent cement sealant system which is able to withstand downhole stresses and high temperatures during production cycles. unlike conventional cem...

mites of family erythraeidae are parasites in their larval stage and predators in their post-larval stages on a variety of arthropods, among which are important pest species. during 2011-2013, in a faunistic survey of mites associated with beetles of the family chrysomelidae in oil and gas company of gachsaranregion, iran. specimens were preserved in ag (alcohol 75%, glyserin 5%), cleared in la...