Journal ArticleDOI
Rapid colorimetric determination of nitrate in plant tissue by nitration of salicylic acid
Reads0
Chats0
TLDR
In this article, an analysis for the rapid determination of nitrate-N in plant extracts is described. And the complex formed by nitration of salicylic acid under highly acidic conditions absorbs maximally at 410 nm in basic (pH>12) solutions.Abstract:
An analysis is described for the rapid determination of nitrate‐N in plant extracts. The complex formed by nitration of salicylic acid under highly acidic conditions absorbs maximally at 410 nm in basic (pH>12) solutions. Absorbance of the chromophore is directly proportional to the amount of nitrate‐N present. Ammonium, nitrite, and chloride ions do not interfere.read more
Citations
More filters
Book ChapterDOI
Nitrogen - inorganic forms.
TL;DR: In this article, Bremner et al. defined the nonexchangeable NHt as the NHt in soil that cannot be replaced by a neutral potassium salt solution (SSSA, 1987), in contrast to NHt which is extractable at room temperature with such a solution.
Journal ArticleDOI
The sequencing batch reactor as a powerful tool for the study of slowly growing anaerobic ammonium-oxidizing microorganisms
TL;DR: It is suggested that the SBR could be used for the enrichment and quantitative study of a large number of slowly growing microorganisms that are currently out of reach for microbiological research.
Journal ArticleDOI
Photosynthetic acclimation of plants to growth irradiance: the relative importance of specific leaf area and nitrogen partitioning in maximizing carbon gain
John R. Evans,Hendrik Poorter +1 more
TL;DR: Changes in specific leaf area (SLA, projected leaf area per unit leaf dry mass) and nitrogen partitioning between proteins within leaves occur during the acclimation of plants to their growth irradiance, and the relative importance of both of these changes in maximizing carbon gain is quantified.
Journal ArticleDOI
Nitrogen release from the leaves of some tropical legumes as affected by their lignin and polyphenolic contents
Cheryl A. Palm,Pedro A. Sanchez +1 more
TL;DR: In this article, the chemical composition and N release patterns of legumes being used in tropical agroecosystems were determined in a laboratory experiment and three patterns of net N mineralization emerged during the 8-weeks.
References
More filters
Journal ArticleDOI
The determination of nitrate in soil solutions by ultraviolet spectrophotometry
TL;DR: In this article, ultraviolet spectrophotometric analysis has been applied to the determination of nitrate nitrogen over the 0·5 to 10 p.m. range in soil solutions and perfusates in the absence of organic matter.
Journal ArticleDOI
The Role of Light and Nitrate in the Induction of Nitrate Reductase in Radish Cotyledons and Maize Seedlings.
Journal ArticleDOI
Instrumental methods for analysis of soils and plant tissue
L. M. Walsh,Lowell A. Douglas +1 more
TL;DR: Instrumental methods for analysis of soils and plant tissue were proposed in this article, where the authors presented a method for analyzing soil and plant tissues using an instrumentation based approach.
Journal ArticleDOI
Spectrophotometric determination of nitrate using chromotropic acid
Philip W. West,T.P. Ramachandran +1 more
TL;DR: In this paper, a spectrophotometric method is described for the determination of nitrate in the 0.5 to 50μg range using chromotropic acid as the reagent and masking agents for the elimination of possible critical interferences due to chloride, chlorine, iron(III) and oxidants.