Journal ArticleDOI
Use of an automatic CHN analyzer to determine organic and inorganic carbon in soils
G. Giovannini,G. Poggio,P. Sequi +2 more
TLDR
In this article, an automatic CHN analyzer was used to determine the organic and inorganic carbon content of soils, and the results showed that at 500°C complete oxidation of soil organic matter occurs without appreciable decomposition of carbonates.Abstract:
Differential thermal analysis shows that in soils organic matter and carbonates react in very different temperature ranges. An automatic CHN Analyzer was therefore used to determine the organic and inorganic carbon content of soils. At 500°C complete oxidation of soil organic matter occurs without appreciable decomposition of carbonates. Because only elemental carbon is determined, interferences due to weight losses from structural water in clays are eliminated. Decomposition of carbonates begins above 500° and always is concluded before 1100°C. Total organic and inorganic carbon in soils thus may be determined by running replicates at 500° and 1100°C with the Analyzer.read more
Citations
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Journal ArticleDOI
A simple high sample volume ashing procedure for determination of soil organic matter
TL;DR: In this article, a simple ashing procedure for routine determination of soil organic matter is described, and the proposed procedure incorporates a computerized weighing system and permits 1600 organic matter determinations per day.
Procedures for Handling and Chemical Analysis of Sediment and Water Samples
TL;DR: The second generation Interim Guidance as mentioned in this paper provides state-of-the-art guidance on the subjects of sampling, preservation, and analysis of dredged and fill material, as well as its use as an aid in the regulatory process.
Journal ArticleDOI
Control of litter decomposition in a subalpine meadow-sagebrush steppe ecotone under climate change
M. Rebecca Shaw,John Harte +1 more
TL;DR: This paper examined in situ litter decomposition rates of native plant litter of different growth forms (grass, forb, and shrub) in two microclimates (xeric and mesic) in a Colorado subalpine meadow-sagebrush steppe ecotone.
Journal ArticleDOI
The measurement of carbon in soils using a microprocessor‐controlled resistance furnace
R. H. Merry,L.R. Spouncer +1 more
TL;DR: In this paper, the Leco CR-12 resistance furnace has been used for carbon determination in soils using a microprocessor-controlled furnace. But the results showed that the system was well suited to soil analysis, being fast, reliable, precise and accurate as well as being easy to use.
References
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Journal ArticleDOI
An Examination of the Degtjareff Method for Determining Soil Organic Matter, and a Proposed Modification of the Chromic Acid Titration Method
A Walkley,I A Black +1 more
TL;DR: WALKLEY as discussed by the authors presented an extension of the DEGTJAas discussed by the authorsF METHOD for determining soil organic matter, and a proposed modification of the CHROMIC ACID TITRATION METHOD.
Journal ArticleDOI
Loss-on-ignition as an estimate of organic matter and organic carbon in non-calcareous soils
TL;DR: In this paper, a good correlation exists between loss-on-ignition and organic C values, determined by Tinsley's method, and regression lines and prediction limits are given from the data obtained.
Journal ArticleDOI
Loss-on-Ignition as an Estimate of Soil Organic Matter
TL;DR: In this article, loss on ignition at 430C of calcareous and non-calcareous soils has been compared with organic matter contents estimated by a wet oxidation method, and the presence of CaCO₃ did not affect the magnitude of the ignition loss and the gravimetric method provided both a reliable and simple estimation of soil organic matter.
Journal ArticleDOI
Interaction of organic compounds with calcium carbonate—I. Association phenomena and geochemical implications
TL;DR: In this paper, organo-carbonate associations in seawater appear to reduce reaction rates of inorganic carbonate equilibria and may inhibit reaction entirely if isolation of the mineral by organo carbonate associations is complete.
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