rice (oryza sativa l.) is one of the iran's most strategic crops with water shortage as the most important abiotic stress limiting its yield. in the present research the effects of: variety, water regime, nitrogen (n) and phosphorus (p) levels on n, p and k uptake were studied under greenhouse conditions. the experiment design was a factorial one based upon a randomized complete blocks of ...

This paper gives an account of the R/S statistic and its known properties. I t assesses the adequacy of the asymptotic distribution of the statistic in the case of samples of small and moderate size, and suggests an improved approximation based on the beta distribution. The results indicate that the proposed beta approximation is superior to the asymptotic distribution for practical purposes. H...

forest cover is one of the most effective factors in reducing flooding in northern iran, so that in recent years the destruction, land use changing and uncontrolled harvesting of forest areas, has greatly increased the number and magnitude of floods. so far, there have been few studies on forest hydrology in iran, particularly the northern hyrcanian forests. this study examines the impact of a ...

BEGIN l o w l e v e l t r a n s f o r m a t i o n s c a n r e q u i r e a l o t o f A I p l a n n i n g SUM:=1; TOP:=2*LN(X); TERM:=1; [Fickas85]. FOR I:=1 TO 20 DO BEGIN Now consider this same matrix multiply example in a language TERM:=(TOP/I)*TERM; SUM:=SUM+TERM; l i k e A P L t h a t e m b r a c e s t h e c o n c e p t o f m a t r i c e s a n d m a t r i x END; operations. This new language...

Rhode R i v e r s y s t e m have shown t h a t a d i v e r s e w e t l a n d ( M i l l Swamp) h a s a s i g n i f i c a n t i m p a c t on n u t r i e n t r u n o f f f r o m u p l a n d w a t e r s h e d s . I n t h i s p a p e r we p r e s e n t d a t a t o d e m o n s t r a t e how w a t e r q u a l i t y p a r a m e t e r s change as s u r f a c e and s u b s u r f a c e w a t e r moves t h...

We analyze the problem of determining inventory and pricing decisions in a two-period retail setting when an opportunity to refine information about uncertain demand is available. The model extends the newsvendor problem with pricing by allowing for multiple suppliers, the pooling of procurement resources, and more general informational dynamics. One contribution is the solution procedure: we s...

U s i n g a mode l f o r t h e e v o l u t i o n o f f i t n e s s , we s h o w how C o m p u t e r S i m u l a t i on c a n be u s e d to e x a m i n e w h e t h e r a t h e o r e t i c a l mode l c a n be t e s t e d b y e x p e r i m e n t a l d a t a . A m a x i m u m l i k e l i h o o d f i t o n s i m u l a t e d m e a s u r e m e n t s was a b l e to s e p a r a t e t h e p a r a m e t e...

shortage of irrigation water, being a crucial problem in arid and semiarid regions, makes it necessary to use treated wastewater in agriculture. a field experiment was conducted to investigate the effect of treated municipal wastewater (tmw) on the yield and fiber quality of cotton (gossypium hirsutum l.) (mehr variety). treated municipal wastewater was supplied from shahrake ghods sewage treat...

s u b s e t s . T h i s s t r u c t u r e , u s u a l l y v i e w e d a s c o d i f y i n g a t r i a n g u l a t e d s p a c e , i s u s e d h e r e d i r e c t l y , t o d e s c r i b e " s p a c e s " w h o s e g e o m e t r i c r e a l i s a t i o n c a n b e m i s l e a d i n g . A n i n t r i n s i c h o m o t o p y t h e o r y , n o t b a s e d o n s u c h r e a l i s a t i o n b u t a g...

drought is the most common environmental stresses that affects plant growth. to study the combined effects of arbuscular mycorrhizal fungi (glomus intratadices) and jasmonic acid on growth and ecophysiologycal characteristics of pistachio seedlings cv. qazvini under drought stress, a greenhouse experiment was conducted in a completely randomized design with three replications. experimental fact...