The Determination of Polyuronides in Soils with Carbazole1

Lynch, D. L.; Hearns, E. E.; Cotnoir, L. J.

doi:10.2136/sssaj1957.03615995002100020008x

Cited by 30 publications

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“…upon withdrawal, the lower 10 information on weathering, mineral alter-cm of soil was removed from the tube; a collecation, and elemental cycling. Polyuronide content was determined by the method described by Lynch et al (1957) (Beke 1969 Values for Si in lysimeter leachages were less than I mglL and variability was low.…”

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confidence: 99%

The Genesis of a Gray Luvisol Within the Boreal Forest Region. Ii. Dynamic Pedology

HOWITT¹,

Pawluk²

1985

Can. J. Soil. Sci.

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An undisturbed site under forest cover near Breton, Alberta, was chosen to study the dynamics of a Gray Luvisol. Soil moisture and temperature were monitored at selected depths over a 2-yr study period. Canopy drip collectors and gravity lysimeters were used to study soil solution transport and the process of lessivage. The order of cation concentration for canopy drip, LFH and Ae lysimeter samples was K+ > Ca++ ) Na+ ) Mg**. The lysimeter samples from the Bt showed Na* ) Ca* * ) K* > Mg* *. Lysimeter studies further indicated that micaceous clays were being illuviated into the upper Bt horizon. Water movement into the Ae horizon was found to be regulated by the LFH horizon; ice lensing in winter appeared to enhance the formation of the platy structure. The major processes in this soil are the translocation ofFe, Al and organic constituents both in solution and in colloidal form; the concentration of these elements was a function of the rate of water movement. The concentration of other cations was independent of the rate of water movement.

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confidence: 99%

The Genesis of a Gray Luvisol Within the Boreal Forest Region. Ii. Dynamic Pedology

HOWITT¹,

Pawluk²

1985

Can. J. Soil. Sci.

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“…Determinations of polyuronides by the method of Lynch et al (1957) gave values of about 50 mg/Ioo g for soil A; this is less than 5 per cent of the likely total carbohydrate content of the soil. Small amounts of sugars with high R F values are also present, but were not determined.…”

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confidence: 86%

The Hydrolytic Extraction of Carbohydrates From Soil by Sulphuric Acid

Cheshire

Mundie

1966

Journal of Soil Science

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The parameters of the extraction and hydrolysis of soil carbohydrates by methods involving 24N H,SO, and N H2S04 were studied for a sandy granitic loam. Sugars were measured by alkaline ferricyanide, orcinol, anthrone (hexoses), orcinol-ferric chloride (pentoses), cysteine-sulphuric acid (methyl pentoses), glucose oxidase (glucose), and also by analysis of the individual sugars by paper chromatography.After shaking the soil with z4N H2S04 at zoo C a further period of treatment with N H2S04 at IOOO C was required to obtain maximum hydrolysis of the soil carbohydrates. This period decreased from 17 h to 5 has the time with 24N H,S04 increased from z to 16 h. N H2S04 at 1 0 0 ' C alone was less efficient. The extraction of pentoses by 24N H,SO, reached a maximum within 8 h, and methyl pentoses within 4 h, both declining thereafter. The release of hexoses was continuing after 40 h.The best compromise involved extraction with 24N H,SO, for 16 h followed by hydrolysis with N H,S04 for 5 h. By this treatment yields of pentoses and methyl pentoses were respectively gg and gz per cent of the maximum obtainable.

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“…(2), Thomas and Lynch (12) and Lynch et at.' (5), respectively. The hexosamines were determined by the method of Stevenson 1-to), eri.pt that soil hydrolyzates were obtained as described by Sowden (9).…”

Section: Methodsmentioning

confidence: 97%

Some Carbohydrate Fractions of a Gray Wooded Soil as Influenced by Cropping Systems and Fertilizers

Khan¹

1969

Can. J. Soil. Sci.

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A study was made to determine the long-term effect of two cropping systems and various fertilizer treatments on organic carbon, nitrogen and some of the carbohydrate constituents in Breton plot soils.Organic carbon, nitrogen, hexose, pentose, uronic acid, hexosamine and hexosamine-N contents were significanrly grearer in soils from plots in a 6ve-year rotation of grains and legumes than in a wheat-fallow sequence.

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The Determination of Polyuronides in Soils with Carbazole1

Cited by 30 publications

References 0 publications

The Genesis of a Gray Luvisol Within the Boreal Forest Region. Ii. Dynamic Pedology

The Genesis of a Gray Luvisol Within the Boreal Forest Region. Ii. Dynamic Pedology

The Hydrolytic Extraction of Carbohydrates From Soil by Sulphuric Acid

Some Carbohydrate Fractions of a Gray Wooded Soil as Influenced by Cropping Systems and Fertilizers

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