نتایج جستجو برای: leaves elements
تعداد نتایج: 353284 فیلتر نتایج به سال:
Over 400tons of Pb enters Swiss soils annually at some 2000 military shooting ranges (MSRs). We measured elements in the leaves of 10 plant species and associated rhizospheric soil on the stop butt of a disused MSR. The geometric mean concentrations of Pb, Sb, Cu, Ni in rhizospheric soils were 10,171mg/kg, 5067mg/kg, 4125mg/kg and 917mg/kg. Some species contained Pb, Cu and Ni, above concentrat...
Primary bud necrosis (PBN) of grapevine, which is a physiological disorder, seriously decreases the fruit yield of vineyards. This research was carried out to determine the effects of mineral deprivation on increasing the incidence of PBN in ‘Askari’ table grapes in Sisakht region of Southwest of Iran. For this purpose, the changes of mineral elements in leaves and PBN percentage were estimated...
A completely randomized factorial experiment was set up with 16 treatments and three replicates to study the effect of nitrogen and boron on yield, shoot and root dry weights and leaf concentration of nutrient elements in hydroponically grown tomato in greenhouse of Agricultural College of Zanjan University in 2008. In this experiment, tomato seed of Rio Grande Ug was selected and simple and i...
walnut tree is grown for multiple purposes. indeed, it is economically important and increasing its yield and improving its quality in order to compete in the international markets is one of great importance. to this end, one significant management practice is proper use of suitable fertilizers. zinc and phosphorus are two important elements in the nutrition of walnut. in this study, experiment...
This article is a continuation of an article on deening functions on trees (see 7]). In this article we develop terminology specialized for binary trees, rst deening binary trees and binary grammars. We recast the induction principle for the set of parse trees of binary grammars and the scheme of deening functions inductively with the set as domain. We conclude with deening the scheme of deenin...
We investigated accumulation of elements (Ca, Co, Cr, Cu, Fe, K, Mg, Mn, P, Pb, and Zn) in leaves of different ages for 11 evergreen woody plant species from serpentine soils of New Caledonia. Species were classifi ed into four categories of Ni accumulation ability: one species was a non-accumulator (<100 mg Ni/ kg), three were accumulators (100–1000 mg Ni/kg), two were hyperaccumulators (1000–...
the present research was conducted to accomplish two purposes. firstly, it aimed to explore and describe schematic structure or what halliday and hassan (1989, p.64) have called “generic structure potential” (gsp) of american english, iranian persian and iranian english newspaper editorials within systemic functional linguistics. secondly, a quantitative cross-comparison was made to investigate...
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