Journal ArticleDOI
A novel digestion technique for multi-element plant analyses
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TLDR
In this paper, an expedient digestion method for serial determinations of N−total, P, Na, K, Ca and Mg in plant material is proposed, where all determinations are performed on one digest, the only limitation being that the Ca content should not exceed 1100 mmol Ca per kg dry plant material.Abstract:
An expedient digestion method for serial determinations of N‐total, P, Na, K, Ca and Mg in plant material is proposed. All determinations are performed on one digest, the only limitation being that the Ca content should not exceed 1100 mmol Ca per kg dry plant material.read more
Citations
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A new technique for extracting the red edge position from hyperspectral data: The linear extrapolation method
TL;DR: In this paper, a linear extrapolation of straight lines on the far-red (680 to 700 nm) and NIR (725 to 760 nm) flanks of the first derivative reflectance spectrum was used to estimate the red edge position (REP), which is then defined by the wavelength value at the intersection of the two lines.
Journal ArticleDOI
Fungal/bacterial ratios in grasslands with contrasting nitrogen management
TL;DR: In this article, the effect of crop (grass and grass-clover), N application rate (0, 40, 80, ) and manure type (no manure, farm yard manure and slurry) on the F/B ratio within three growing seasons was tested, as well as relations with soil and crop characteristics, nitrate leaching and partial N balance.
Journal ArticleDOI
Digestion of plant tissue for analysis by ICP emission spectroscopy
TL;DR: In this article, a method of digesting plant tissue samples for multi-element analysis by inductively coupled plasma (ICP) emission spectroscopy was developed which does not require the use of HclO4.
Journal ArticleDOI
Diversity–productivity relationships: Initial effects, long-term patterns, and underlying mechanisms
TL;DR: Results from 4 consecutive years of a plant diversity experiment without legumes show that a positive relationship between plant species richness and productivity emerged in the second year and strengthened with time, and show that increased nutrient use efficiency at high species richness is an important underlying mechanism.
Journal ArticleDOI
Soil acidity and nutrient supply ratio as possible factors determining changes in plant species diversity in grassland and heathland communities.
W.J Roem,Frank Berendse +1 more
TL;DR: Soil acidity was the variable most strongly correlated with plant species diversity in heathland and grassland communities and it was found that increased N:P and N:K ratios in plant biomass had additional negative effects.
References
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Journal ArticleDOI
A wet oxidation procedure suitable for the determination of nitrogen and mineral nutrients in biological material
J. A. Parkinson,S. E. Allen +1 more
TL;DR: In this paper, a mixture of sulphuric acid and hydrogen peroxide with the addition of lithium sulphate to elevate the digestion temperature and selenium as catalyst is described, which is suitable for the determination of nitrogen, phosphorus and most mineral ions.
Journal ArticleDOI
Total nitrogen determination in plant material by means of the indophenol-blue method.
TL;DR: In this paper, the indophenol blue method for the determination of NH3 in digests of plant material is modified by the introduction of a dilution step, which is necessary because of the sensitivity of the method, and the use of a phosphate buffer to suppress pH influence caused by slight variations in the acid content of the digests.
Journal ArticleDOI
Simultaneous determination of nitrogen, phosphorus and potassium in plant material by automatic methods.
Judith V. O'neill,R. A. Webb +1 more
TL;DR: Using one acid digest of plant material, three determinations, for nitrogen, phosphorus and potassiums are carried out simultaneously and automatically as discussed by the authors, using a two-way table produced as a computer print-out.