evaluation of river discharges trends is very important for water resources management and design of irrigation and drainage networks. in this research, annual, seasonal and monthly trends of maroon river discharge were evaluated using the mann-kendall and sen’s slope estimator non-parametric tests and the regression analysis parametric test. for this purpose, river discharge data from five h...

plant analysis is successfully used in monitoring nutritional status, recommending fertilizer rates and types, and maximizing fertilizer efficiency in sugar beet. diagnosis and recommendation integrated system (dris) is a comprehensive approach which does not have limitations of the critical value approach (cva) and sufficiency range approach (sra). over- dose application of fertilizer increase...

in this study, the effect of drought and different concentrations of silicon was examined on seed yield, essential oil percentage and physio-chemicals properties in fennel plant. the experimental design was a split plot with three irrigation regimes: irrigation at 100, 70 and 40 percent of fc comprising the main treatments, and five levels of silicon foliar sprays (0, 2.5, 5, 7.5 and 10 mm) as ...

boron toxicity is becoming more extensively widespread in arid and semi arid regions, due to the application of either saline waters or irrigation waters containing a relatively high b content. results of research indicate that addition of certain plant nutrients such as n may reduce the harmful effect of high b levels. therefore, the present experiment was undertaken to evaluate the interactiv...

to study the response of pinto-bean yield and yield components in intercropping with maize and naked-pumpkin under weed competition, two similar experiments were conducted in rasht and roudsar separately each in a randomized complete block design with 3 replications on factorial arrangements experiment in 2013. the treatments of first factor consisted of  pinto bean (100 and 75%) sole cropping,...

in order to study, the effect of pre-cooling treatment, osmotic potential and water stress on some population of two species of satureja bachtiarica and satureja sahendica was studied by a factorial experiment based on completely randomized design with three replications in laboratory and greenhouse conditions during one year in the gene bank of institute of forests and range lands by the years...

plant growth-promoting rhizobacteria (pgpr) is an alternative to chemical pesticides against harmful microorganisms especially soil-borne diseases. rhizoctonia solani is one of the most important soil-borne fungal pathogens that causes serious damages to important crops. in this study, to screen successful pseudomonas bacterial isolates, the inhibition of pathogen growth was evaluated in-vitro....

f o r m e d t h e o p e r a t i o n a l f o u n d a t i o n s o f s c i e n c e , t h a t w e r e l a r g e l y t h e h e r i t a g e f r o m t h e t i m e o f A r i s t o t l e , i n t o i t s m o d e r n f o r m . T h e s e n e w f o u n d a t i o n s c o n s i s t e d o f t h e u s e o f ( 1 ) P h y s i c a l E x p e r i m e n t s a n d t h e u s e o f ( 2 ) M a t h e m a t i c a l M o d e l...

drain envelopes play significant roles in the performance of drainage systems due to theirreduction in letting sediments into the drainpipes and also because of an increase in thehydraulic conductivity of soil around the drainpipes. throughout the present research, theeffect of a one 1000 hour flow on dual envelopes consisting of geotextile as a means ofimproving the hydraulic gradient and rice...

background and objectives: bitter melon is one of the anti-cancer medicinal plants that it’s wide level in vitro propagation and anti-cancer material production was necessary. different factors such as genotype, selected explants’ type and it`s preparation conditions influenced regeneration content. plant growth regulator`s effect on callogenesis and indirect regeneration from parangipetai indi...