soils of the arid–semiarid karaj basin in north-central iran have formed on alluvium-colluvium derived from mixed calcareous-gypsiferous marls of miocene and basic igneous rocks of holocene age. in order to characterize and classify the soils and to determine the soil-landscape relationship in the area, sixteen pedons located on different physiographic positions have been described, sampled and...

macro and micromorphological investigations were conducted on selected xerepts soils from southern iran to identify changes in soil characteristics with time. soil samples from similar pedons of four irrigated orchards ranging in age from 20 to 100 years were studied and compared with soil samples of a pedon of non-irrigated land. in addition to routine analyses, undisturbed blocks of soils...

A new species Sinosenecio yangii D.G. Zhang & Q. Zhou (Asteraceae, Senecioneae) from Guizhou Province, China, is described and illustrated based on its morphological characteristics molecular evidence. It closely resembles S. confervifer guangxiensis , the former in scapigerous habit smooth glabrous achene surface, latter calyculate involucre purple abaxial leaf both shape indumentum of lam...

background & aim: satureja khuzistanica jamzad. is an aromatic and medicinal perennial plant belongs to family mint (lamiaceae). it is also an iranian exclusive endemic species, its essential oil components are widely used in medicinal, culinary, and perfume industries. experimental: flowers were collected in 10 regions in khuzistan and lorestan provinces, iran at early anthesis during 2009...

abstract geomorphology and soil genesis and its development are closely related. besides, soil-landscape studies provide a better understanding of soil forming processes. the objectives of the present research include soil genesis studies, micromorphology and clay mineralogy of soils related to geomorphic surfaces in jiroft area. soil temperature and moisture regimes of the area are hyperthermi...