abstract the objective of current research is to investigate distribution patterns of vegetation types and its relation with environmental factors in southern margin of haj aligholi kavir of damghan. three vegetation types including halecnemum strobilaceum, sedlitzia rosmarinus and artemisia sieberi were studied in marginal arid regions and uplands of the study area. firstly, geographic locatio...

fertility rate is an economically important trait in sheep, which is influenced by genetic and environment. so far, three genes have been identified that affects this trait, one of them would be the bmp family, the most famous one is bmp15. different mutations in the bmp15 gene, increases reproductive performance and growth rate in sheep. the aim of this study was to investigate the genetic and...

abundance and multilateral extension of prominent genus and species of brachiopoda in the majority of sedimentation series of the late devonian have been observed in all parts of iran. the variability and rapid change in this respect has made it possible to delineate different lines of orthogenetism, biozonation and present biostratigraphical models at the sub-stage level. these characteristics...

application of biofertilizers, especially plant growth promoting rhizobacteria (pgpr) is one of the most important strategies for plant nutrition compared to chemical fertilizers, especially in sustainable management of agroecosystems. in order to evaluate the effect of pesodomonas bacteria strains and chemical phosphate fertilizer on yield and yield components of wheat the kavir cultivar an ex...

the cheshmeh hafez polymetal deposit is located in troud – chahshirin mountain range in southeastern damghan. in this province, the volcanism and associated mineralization are closely related to major faults anjilo and troud with nw-se trend. the exposed rocks in the study area consist of volcano clastic sequence of sandstone, tuff, volcano breccias and mostly andesitic and andesitic- basalt fl...

the bedriaga's plate-tailed gecko, teratoscincus bedriagai, nikolsky, 1900 is distributed in the northern and eastern deserts of sistan, iran and the desert regions of southern afghanistan. in this research, the male reproductive cycle of this lizard has been studied from 5 april to 5 august, 2013. totally, 40 adult males were collected by hand at midnight from four adjacent stations in damghan...