activities of thirty bacterial strains obtained from plants rhizosphere in different areas against phytophthora drechsleri were assessed through in vitro and greenhouse experiments. dual culture and extracellular metabolites tests were used in in vitro assays. the bacterial strains inhibited growth of p. drechsleri, the highest inhibition zones was belonged to t17-4 strain with 61.904% in dual ...

precise application of the n fertilizer rate is critical to achieve maximum yield. in major regions, empirical methods were used for determining n fertilizer requirement. these methods cannot take into account variation in management and environmental conditions on determining fertilizer requirement. crop simulation models can provide an alternative means of determining the optimum crop n requi...

willows due to the rapid growth rate, low nutrient requirements, resistance to many pollutants, and environmental stresses are ideal candidates for developing the landscapes and reducing the environmental degradation. the purpose of this study was to determine the response of salix alba seedling to water deficit conditions. this experiment was set up as complete randomized design with five irri...

D i e p h o t o g r a p h i s c h e W i r k u n g d e r R ö n t g e n s t r a h l e n w u r d e a n z w e i h o c h e m p f i n d l i c h e n E m u l s i o n e n i m W e l l e n l ä n g e n b e r e i c h v o n 1 , 3 A E b i s 0 , 0 1 A E u n t e r s u c h t . D i e Z a h l d e r v o n e i n e m a b s o r b i e r t e n Q u a n t e n t w i c k e l b a r g e m a c h t e n B r o m s i l b e r k ö r...

to determine sugar beet water requirement and the effect of changing the quantity of applied water on some production components, a study was carried out in ekbatan agricultural research station of hamedān, iran in four years (1994-1997) during which optimum water requirement, root and sugar yield, water use efficiency on the basis of root yield, sugar percentage and water use efficiency on the...

"̂T^ H A T P O T E N T I A L F O R T E 1 E E N R I C H M E N T O F I s c i e n c e is w h a t B a r r o w h a s se t o u t t o e x p l o r e _JL i n Impossibility. A p r o f e s s o r o f a s t r o n o m y a t t h e U n i v e r s i t y o f S u s s e x i n E n g l a n d , B a r r o w w r i t e s w i t h g r e a t s c h o l a r s h i p , e l e g a n c e a n d w i t . H e classif ies t h e l i m i ...

the aim of this study was to investigate the relationships between air, noise, light and landscape pollution on job stress of staff work in high schools of different districts (1, 2, 10 and 11) of tehran. this stress can reduce the efficiency of the personnel. the number of people participated in this research was 250, selected by random from different schools of the districts. the questionnair...

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...

introduction numerous studies have demonstrated the relationship between the amount of co2 in the atmosphere and climate change. in this respect, developed countries have an undeniable role and cause serious damage to earth environment throughout the world. ipcc’ forth evaluation report implies that adding greenhouse gases to the atmosphere during recent decades prevents the heat rays to emit w...

trehalose is an important disaccharide signal metabolite in plants which is involved in various aspects of plant function such as response to stress, photosynthesis and carbon allocation and partitioning. a mutant of arabidopsis lacking trehalose-6-phosphate synthase activity (tps1) accumulates ascorbate. exogenous ascorbate application ameliorates trehalose induced growth inhibition of wild ty...