Cobalt In Soils Research Articles

Radioactive determination of iron, cobalt, zinc, scandium, cesium, and antimony in soils and plants

Radioactive determination of iron, cobalt, zinc, scandium, cesium, and antimony in soils and plants

Routine Determinations of Traces of Cobalt in Soil and Plant Tissue by Instrumental Neutron Activation Analysis

(1972). Routine Determinations of Traces of Cobalt in Soil and Plant Tissue by Instrumental Neutron Activation Analysis. Acta Agriculturae Scandinavica: Vol. 22, No. 2, pp. 103-106.

The Relation between Extractable Soil Cobalt and the Cobalt Content of some Gasses from the Lake Shore Areas of Uganda

Zeitschrift für Pflanzenernährung und BodenkundeVolume 126, Issue 3 p. 238-244 Article The Relation between Extractable Soil Cobalt and the Cobalt Content of some Gasses from the Lake Shore Areas of Uganda M. I. E. Long, M. I. E. Long M. I. E. Long, P.O. Box 24, Entebbe/Uganda.Search for more papers by this authorSusanne Frederiksen, Susanne FrederiksenSearch for more papers by this author M. I. E. Long, M. I. E. Long M. I. E. Long, P.O. Box 24, Entebbe/Uganda.Search for more papers by this authorSusanne Frederiksen, Susanne FrederiksenSearch for more papers by this author First published: 1970 https://doi.org/10.1002/jpln.19701260307Citations: 1 AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume126, Issue31970Pages 238-244 RelatedInformation

The isotopically exchangeable form of native and applied cobalt in soils

The experimental conditions and precision of alternative methods of measuring isotopically exchangeable cobalt (Coi.e) were investigated. The values of Coi.e varied from 0.16 to 5.4 p.p.m. for 25 soils and were highly correlated with the sum of cobalt extracted by ammonium acetate and subsequently by quinol, and the relationships between these forms are discussed. The amounts of cobalt sorbed in the presence of calcium chloride by different soils varied markedly between and within soil groups. The bonding energy of specific sorption of cobalt did not vary significantly between soils after the first sites were filled. Cobalt sorption capacity for all soils studied was highly correlated with cobalt content and surface area and to a lesser extent with manganese and clay content and pH, but not with organic matter. When soils of high montmorillonite content were excluded, highly significant correlations were obtained only with manganese and cobalt contents and surface area. The initial slope of isotherms of isotopically exchangeable cobalt 60Co(soi1)/60Co (solution) and Coi.e may provide measures of the intensity and capacity factors, respectively, of cobalt availability to plants.

Nickel, Iron, and Manganese in the Metabolism of the Oat Plant

THE first definite report of a toxicity induced in plants by a localized high concentration of nickel appears to be that of Hunter and Vergnano1, while 2 years later2 Hunter described the occurrence of an identical condition on what was apparently similar terrain in Southern Rhodesia, namely a poorly drained upland region with outcropping serpentine. An investigation of disease symptoms which appeared in an oat crop growing on just such an area at Wallendbeen, southern New South Wales, in 1960 was attributed to the high incidence of available nickel in the soil. This was substantiated by analysis of the affected plants, which occurred in large patches in the field, and also of soil from both affected and unaffected areas. A further series of sand culture experiments established that nickel, and to a lesser extent cobalt, was capable of reproducing the symptoms in oat plants. The analysis of soil and minerals removed from both outcrops and subsoil indicated that nickel alone was responsible for the condition of the crop, however; the level of cobalt in both soil and affected plants was little different from that in material from unaffected areas.

The association of trace elements with manganese minerals in Australian soils

In widely different types of Australian soils birnessite and lithiophorite appear to be the common forms of occurrence of mineralized manganese. These mineral forms were dissolved out of the soil by hydrogen peroxide acidified to pH 3 with nitric acid and analyses of the extracts were made. It was found that the concentration of trace elements is generally quite high in these minerals. In particular, most of the soil cobalt (average 79%) was contained in or associated with these minerals where they were present.

Determination of ammonium citrate-soluble cobalt in soils and sediments

Intensity of the pink to red color of a cobalt complex with 2-nitroso-1-naphthol measures the amount of cold extractable cobalt in the range 1-60 ppm for 0.2 gm samples. The method permits more than 100 determinations per day.

The cobalt status of Tasmanian soils. I. Total cobalt in soils, and cobalt content of subterranean clover grown in pots

Total cobalt was determined in 104 samples of Tasmanian surface soils. It was moderate to high (4–82 p.p.m.) in krasnozems and lateritic krasnozems, and high (11–94 p.p.m.) in brown earths, black earths, and prairie soils, all of which were derived from basalt or dolerite. It was also high in soils of the lateritic podzolic Cressy series, but low in another lateritic podzolic, the Brickendon series. Approximately half the samples of various kinds of podzolic soils had less than 3 p.p.m. The cobalt content of subterranean clover grown in pots on 92 soil samples from Tasmania showed large differences between the soil groups. The krasnozems stood out with generally low values, ranging from 0.05 to 0.30 p.p.m., with over 60% of samples less than 0.10 p.p.m. On the various podzolic soils the cobalt content of the clover ranged from 0.08 to 2.1 p.p.m., with over 80% of the samples between 0.10 and 0.55 p.p.m. On the brown-black earth group it was generally high, ranging from 0.17 to 0.63 p.p.m. Soil pH did not account for these differences. Cobalt deficiency in sheep and cattle has been recorded on krasnozems and on podzolic soils in Tasmania but not on the brown-black earth group. It is suggested that ingestion of soil may be more important in the cobalt nutrition of the ruminant on krasnozems than on most other soils.

Direct Methods of Estimation in the Spectrographic Analysis of Cobalt in Soil Concentrates

THE relationship which forms the basis of the internal standard method of Spectrographic analysis may be written : where I T, I S are the respective intensities of the analysis and internal standard lines; C T, C S are the respective concentrations of the analysis and internal standard elements ; and a, n are constants dependent on the general conditions of excitation. In its application to the determination of trace constituents in biological concentrates1, the internal standard, which is iron, varies in content, and the calibration involves three steps : (a) obtaining plots of log I T/I S (background-corrected) against log C T for sets of standard mixtures K, L, M, N, … containing increments of the internal standard element from one set to the next ; (b) selecting one of these as the standard working curve, for example, the plot from the M set ; and (c) deriving a correction graph for the C S value of the sample. The calibration curves for cobalt, namely, log I T/I S versus log C T (10–1,000 p.p.m.) and log I S/I S(M) versus log C S (2.0–50.0 per cent Fe2O3), are obtained as straight lines of unit gradient.

A Study of Extractable Soil Cobalt in Soils of the Southeastern United States

AbstractThe relationship between 2.5% acetic acid‐dithizone extractable soil cobalt and the amount of cobalt in black gum leaves, a cobalt indicator, was investigated for 71 widely distributed soils of the southeastern United States. The soil samples were from both good areas and areas where cobalt deficiency in ruminants would be expected on the basis of previous analyses. The extractable cobalt values appeared to separate the Ground‐Water Podzols, the Humic‐Gleys and the Low Humic‐Gleys from the better drained Regosols and Red‐Yellow Podzolic soils studied. At comparable cobalt concentrations in the black gum, the extracted cobalt was less from the imperfectly to poorly drained soils than from the well‐drained soils. For each of the two broad groups of soils, a significant correlation was obtained between extractable soil cobalt for the A1 horizon and the cobalt concentration in the black gum. Because of the variability in horizon thickness among the different soils, the cobalt values were calculated for the 0‐ to 6‐ and 0‐ to 12‐inch depths. The correlation between these values and plant cobalt was also good. The acetic acid‐dithizone extractable cobalt appears useful in indicating areas of potentially low soil cobalt in the Southeast where deficiency in cattle or sheep might be a problem.

The movement of cobalt and zinc in soils as indicated by radioactive isotopes

A method has been developed whereby labelled cobalt and zinc were applied to the surface of columns of soil in order to study the movement of these cations under the influence of rainfall and various fertilizer treatments. The results of the investigation demonstrate that in soils of moderate exchange capacity, whether this is provided by clay or by organic matter, the cobalt and zinc remain close to the surface of the soil even after the application of water equivalent to several years' rainfall and dressings of copper sulphate, superphosphate, aqueous extract of lucerne, and water saturated with carbon dioxide. With very light soils of low exchange capacity a year's rainfall alone did not leach the cobalt or zinc downwards, but rainfall which followed treatments with the same dressings induced a considerable downward movement of both cobalt and zinc.

Determination of Traces of Cobalt in Soils: A Field Method

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Traces of Cobalt in Soils: A Field MethodHy AlmondCite this: Anal. Chem. 1953, 25, 1, 166–167Publication Date (Print):January 17, 1953Publication History Published online1 May 2002Published inissue 17 January 1953https://doi.org/10.1021/ac60073a032RIGHTS & PERMISSIONSArticle Views44Altmetric-Citations18LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (1 MB) Get e-Alerts Get e-Alerts

Studies on Nickel and Cobalt in Arsenopyrites. I. Estimation and Determination of Cobalt in Some Arsenopyrites

Abstract Nitroso-R-salt method has been investigated for the purpose of determining a minute quantity of cobalt in minerals. In some previous papers it was reported that the method is very satisfactory for determining cobalt in plants, soils and animal nutritions. In this study it has been proved thát the method is also fairly satisfactory for determining cobalt in minerals containing a large amount of iron. Cobalt content of some arsenopyrites has been determined by this colorimetric or the gravimetric method. The result shows that all the samples contain a minute or fairly large quantity of cobalt. However, the problem in what form cobalt is contained in these samples remains for the subsequent studies.