An improved procedure for determining magnesium fertilizer dissolution in field soils

The sequential extraction procedure currently used to measure magnesium (Mg) fertilizer dissolution in soils consists of removing dissolved Mg (step 1), and partially dissolved Mg (step 2), followed by an 18?h extraction with 2 M HCl at room temperature to determine undissolved Mg (step 3). This pro...

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Main Authors: Loganathan, P, Mitchell, AD, Hanly, JA, Aye, Tin Maung
Format: Journal Article
Language:Inglés
Published: Informa UK Limited 2005
Subjects:
Online Access:https://hdl.handle.net/10568/43178
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author Loganathan, P
Mitchell, AD
Hanly, JA
Aye, Tin Maung
author_browse Aye, Tin Maung
Hanly, JA
Loganathan, P
Mitchell, AD
author_facet Loganathan, P
Mitchell, AD
Hanly, JA
Aye, Tin Maung
author_sort Loganathan, P
collection Repository of Agricultural Research Outputs (CGSpace)
description The sequential extraction procedure currently used to measure magnesium (Mg) fertilizer dissolution in soils consists of removing dissolved Mg (step 1), and partially dissolved Mg (step 2), followed by an 18?h extraction with 2 M HCl at room temperature to determine undissolved Mg (step 3). This procedure is satisfactory for soluble and moderately soluble Mg fertilizers but is not an accurate procedure for slightly soluble fertilizers, such as serpentine. When step 3 is replaced by a digestion procedure using 2 M HCl for 4 h at 90–95°C (improved step 3), the total serpentine Mg recovery (dissolved and undissolved Mg) from soil samples, either immediately after serpentine was added to soil or after a 21?day incubation with moist soil, was about 100% compared to 40–50% by the original procedure. The improved procedure also increased the recovery of serpentine Mg applied to field soils. Therefore, this study recommends that the third step of the sequential extraction procedure be replaced by a 4 h digestion using 2 M HCl (90–95°C).
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spelling CGSpace431782024-08-27T10:37:29Z An improved procedure for determining magnesium fertilizer dissolution in field soils Loganathan, P Mitchell, AD Hanly, JA Aye, Tin Maung magnesium fertilizers fertilizer application dissolving new zealand abonos magnésicos aplicación de abonos disolución nueva zelandia The sequential extraction procedure currently used to measure magnesium (Mg) fertilizer dissolution in soils consists of removing dissolved Mg (step 1), and partially dissolved Mg (step 2), followed by an 18?h extraction with 2 M HCl at room temperature to determine undissolved Mg (step 3). This procedure is satisfactory for soluble and moderately soluble Mg fertilizers but is not an accurate procedure for slightly soluble fertilizers, such as serpentine. When step 3 is replaced by a digestion procedure using 2 M HCl for 4 h at 90–95°C (improved step 3), the total serpentine Mg recovery (dissolved and undissolved Mg) from soil samples, either immediately after serpentine was added to soil or after a 21?day incubation with moist soil, was about 100% compared to 40–50% by the original procedure. The improved procedure also increased the recovery of serpentine Mg applied to field soils. Therefore, this study recommends that the third step of the sequential extraction procedure be replaced by a 4 h digestion using 2 M HCl (90–95°C). 2005-09 2014-09-24T08:41:44Z 2014-09-24T08:41:44Z Journal Article https://hdl.handle.net/10568/43178 en Limited Access Informa UK Limited
spellingShingle magnesium fertilizers
fertilizer application
dissolving
new zealand
abonos magnésicos
aplicación de abonos
disolución
nueva zelandia
Loganathan, P
Mitchell, AD
Hanly, JA
Aye, Tin Maung
An improved procedure for determining magnesium fertilizer dissolution in field soils
title An improved procedure for determining magnesium fertilizer dissolution in field soils
title_full An improved procedure for determining magnesium fertilizer dissolution in field soils
title_fullStr An improved procedure for determining magnesium fertilizer dissolution in field soils
title_full_unstemmed An improved procedure for determining magnesium fertilizer dissolution in field soils
title_short An improved procedure for determining magnesium fertilizer dissolution in field soils
title_sort improved procedure for determining magnesium fertilizer dissolution in field soils
topic magnesium fertilizers
fertilizer application
dissolving
new zealand
abonos magnésicos
aplicación de abonos
disolución
nueva zelandia
url https://hdl.handle.net/10568/43178
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