Semiautomated determination of total phosphorus and total kjeldahl nitrogen in surface waters

Crowther, Joan; Wright, B.R.; Wright, W.B.

doi:10.1016/s0003-2670(01)93632-3

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Pot Trial1

Physicochemical Analyses and Biochemical Methane Potential T1

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2016

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Cited by 13 publications

(2 citation statements)

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“…A total of 15 cuts were collected, at 4 to 5 week intervals. Dry matter production was determined following desiccation at 50°C, the samples were then ground and analysed for Total N (Dumas technique; Bremner, 1996) and Total P by Kjeldahl digest (Crowther et al, 1980). Basal applications of K, Ca, Mg, S, N, Cu, Zn, Mn, B, Mo, and Fe were applied to all pots after plant establishment, and subsequent to each cut.…”

Section: Pot Trialmentioning

confidence: 99%

Manure and sorbent fertilisers increase on-going nutrient availability relative to conventional fertilisers

Redding¹,

Lewis²,

Kearton³

et al. 2016

Science of The Total Environment

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Section: Pot Trialmentioning

confidence: 99%

Manure and sorbent fertilisers increase on-going nutrient availability relative to conventional fertilisers

Redding¹,

Lewis²,

Kearton³

et al. 2016

Science of The Total Environment

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“…The pH was measured in 1:5 manure:water extracts. Total Kjeldahl nitrogen (N) and phosphorus (P) TKN and TKP were analysed colourimetrically using the Kjeldahl wet oxidation digestion process (Crowther et al, 1980). Total N and C were quantified (LECO analyser model, make) following Dumas dry combustion principle where samples are combusted at 1050 C (Buckee, 1994).…”

Section: Physicochemical Analyses and Biochemical Methane Potential Tmentioning

confidence: 99%

Assessing refrigerating and freezing effects on the biological/chemical composition of two livestock manures

Pratt¹,

Redding²,

Hill³

et al. 2014

Agriculture, Ecosystems & Environment

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The Nitrogen Cycle in Lough Neagh, N. Ireland 1975 to 1987

Gibson¹,

Stewart²

1992

Intl Review of Hydrobiology

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Results from thirteen years of weekly observations are presented on the nitrogen cycle in Lough Neagh. The data comprised catchment and atmospheric inputs, output via the outflow and calculated losses by sedimentation and denitrification. Nitrate-nitrogen in the rivers is the dominant input fraction and the nitrate loading has increased over the period observed. 52 % of the input N sediments to the lake bottom, but 65 % of this is lost by denitrification. In spite of increasing nitrogen inputs, the summer soluble nitrate concentrations have decreased due to uptake by a perpetual crop of the cyanobacterium Oscillatoria agardhii GOMONT.

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Semiautomated determination of total phosphorus and total kjeldahl nitrogen in surface waters

Cited by 13 publications

References 2 publications

Manure and sorbent fertilisers increase on-going nutrient availability relative to conventional fertilisers

Manure and sorbent fertilisers increase on-going nutrient availability relative to conventional fertilisers

Assessing refrigerating and freezing effects on the biological/chemical composition of two livestock manures

The Nitrogen Cycle in Lough Neagh, N. Ireland 1975 to 1987

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