On‐farm Measurement of Electrical Conductivity for the Estimation of Ammonium Nitrogen Concentration in Pig Slurry

Pig (Sus scrofa domesticus) slurry (PS) is commonly applied as fertilizer to agricultural fields. Knowledge of PS nitrogen content is essential for good management, but PS nitrogen content is highly variable, not only between farms but also within a farm. Laboratory analysis of animal slurries is of...

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Published in:Journal of environmental quality 2012-05, Vol.41 (3), p.893-900
Main Authors: Yagüe, M. R., Quílez, D.
Format: Article
Language:English
Subjects:
Agricultural land
Agriculture
Ammonium
Animal wastes
Animals
Distilled water
Electric Conductivity
Electrochemistry - methods
Environmental risk
Farmers
Farms
Fertilizers
Nitrogen
Nitrogen - chemistry
Pig manure
Quaternary Ammonium Compounds - chemistry
Reagents
Slurries
Swine
Waste Disposal, Fluid - methods
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container_title Journal of environmental quality
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creator Yagüe, M. R.
Quílez, D.
description Pig (Sus scrofa domesticus) slurry (PS) is commonly applied as fertilizer to agricultural fields. Knowledge of PS nitrogen content is essential for good management, but PS nitrogen content is highly variable, not only between farms but also within a farm. Laboratory analysis of animal slurries is often expensive and impractical for routine farmer use. Therefore, when slurry is spread on land, its fertilizer value is generally unknown, resulting in the risk of pollution. In this work, two rapid and suitable for field use methods for determining PS ammonium N (NH4+–N) concentration (Quantofix and conductimetry) are evaluated. The electrical conductivity of a dilution 1 PS:9 distilled water had better results than Quantofix, did not need reagents, and gave a direct value of NH4+–N concentrations (range, 1.0–7.6 kg NH4+–N m−3). The conductimetry method allows the use of alternative waters with EC
doi_str_mv 10.2134/jeq2011.0352
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The conductimetry method allows the use of alternative waters with EC &lt;1.9 dS m−1 for dilution. 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source Wiley-Blackwell Read & Publish Collection
subjects Agricultural land
Agriculture
Ammonium
Animal wastes
Animals
Distilled water
Electric Conductivity
Electrochemistry - methods
Environmental risk
Farmers
Farms
Fertilizers
Nitrogen
Nitrogen - chemistry
Pig manure
Quaternary Ammonium Compounds - chemistry
Reagents
Slurries
Swine
Waste Disposal, Fluid - methods
title On‐farm Measurement of Electrical Conductivity for the Estimation of Ammonium Nitrogen Concentration in Pig Slurry
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