نتایج جستجو برای: chemical variability

تعداد نتایج: 545665  

Journal: :Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 2019

Journal: :Eurasian Chemico-Technological Journal 2017

Journal: Desert 2011
H Mohammad Asgari M Biniaz M Tahmoures Mohammad Jafari

The main objective in the present study was to assess the spatial variation of chemical and physical soil properties and then use this information to select an appropriate area to install a pasture rehabilitation experiment in the Zereshkin region, Iran. A regular 250 m grid was used for collecting a total of 150 soil samples (from 985 georeferenced soil pits) at 0 to 30, and 30 to 60 cm layers...

Zataria multiflora is one of the valuable medicinal plants belonging to the Lamiaceae family. The aromatic aerial parts of this species are traditionally used by endemic folks to flavor some native foods, also for numerous therapeutic functions. In the present study, different plant organs (leaf, flower, stalk and whole aerial organ) were collected from Fanuj region of Sistan & Balouchestan pro...

Journal: :Environmental toxicology and chemistry 2003
Lawrence P Burkhard

A series of modeling simulations was performed to evaluate the underlying factors and principles that drive the uncertainty in measured bioaccumulation factors (BAFs) and biota-sediment accumulation factors (BSAFs) for fish, and to determine which sampling designs minimize those uncertainties. Temporal variability of chemical concentrations in the water column, and the metabolism rate and n-oct...

Journal: :desert 2012
mohammad jafari m tahmoures h mohammad asgari m biniaz

the main objective in the present study was to assess the spatial variation of chemical and physical soil properties and then use this information to select an appropriate area to install a pasture rehabilitation experiment in the zereshkin region, iran. a regular 250 m grid was used for collecting a total of 150 soil samples (from 985 georeferenced soil pits) at 0 to 30, and 30 to 60 cm layers...

2017
Garel Makouanzi Gilles Chaix Sophie Nourissier Philippe Vigneron

Genetic variability of growth and wood chemical properties in a clonal population of Eucalyptus urophylla × Eucalyptus grandis in the Congo Garel Makouanzi, Gilles Chaix, Sophie Nourissier & Philippe Vigneron To cite this article: Garel Makouanzi, Gilles Chaix, Sophie Nourissier & Philippe Vigneron (2017): Genetic variability of growth and wood chemical properties in a clonal population of Euca...

جهانگرد محمدی, , فایز رئیسی گهرویی, ,

Knowledge of the spatial dependency of soil properties, sensitive to grazing systems, is important from an ecosystem protection point of view. In the current study, geostatistical methods and fractal concepts have been used in order to characterize the impact of long-term grazing exclusion on the spatial variability of some soil chemical parameters including organic matter, total nitrogen, avai...

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