منابع مشابه
Exchangeable Aluminum Evaluation in Acid Soils
One of the main factors limiting agricultural production in tropical climate regions is mainly related to the presence of exchangeable aluminum (Al) in highly weathered acid soils. Four methods of Al determination extracted with neutral 1 mol L KCl solution were evaluated: three colorimetric methods (aluminon plus ascorbic acid, and eriochrome cyanine R by FIA) and the usual titrimetric method ...
متن کاملDetermination of exchangeable inorganic nitrogen species in wetland soils.
Thredbo Vi l lage, an Austral ian Alpine resort , discharges secondary treated sewage e f f luen t through an adjacent wetland area to trap suspended and dissolved material before water is discharged into the Crackenback r i ve r (Brodrick 1985). We are current ly evaluating the effect iveness of th is wetland in removing nitrogen species from the sewage e f f luen t by d e n i t r i f i cation...
متن کاملErionite-Na upon heating: dehydration dynamics and exchangeable cations mobility
Erionite is a fibrous zeolite significantly more tumorigenic than crocidolite asbestos upon inhalation. In recent years, several papers have been published aimed at characterizing from the crystal-chemical point of view erionite fibres. As their toxicity has been ascribed to Fe acquired within the human body, studies aimed at characterizing the iron topochemistry have also been published, sugge...
متن کاملInfluence of Exchangeable Cations on Water Adsorption by Soil Clays
little is known about the molecular mechanisms of soil– water interactions underlying this behavior. A considerThe interaction of water with the clay fractions ( 2 m) from two able amount of work has been conducted on specimen midwestern soils was studied using Fourier transform infrared (FTIR) spectroscopy and gravimetric methods. The soil clay fractions were clay minerals and their interactio...
متن کاملPotentiometric multi-syringe flow of exchangeable potassium in soils with in-line extraction
A multi-syringe flow injection system for the potentiometric determination of exchangeable potassium in soil samples is proposed. Firstly, a manifold was devised to allow determination in soil extracts prepared off-line. It was possible to analyze samples prepared in extractants with different composition (Mehlich or Morgan) without physical or chemical modification of the manifold. A linear dy...
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ژورنال
عنوان ژورنال: Agricultural and Food Science
سال: 1965
ISSN: 1795-1895,1459-6067
DOI: 10.23986/afsci.71634