Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil

Four samples of Crowley silt loam soil were weighed into a 2-liter flat-bottomed flasks. After the introduction of 0.4% ground rice straw, 0.01 M CaCl2 were added in each flask and the mixture stirred constantly by a magnetic stirrer to establish oxidized and reduced conditions. It took 13 days of...

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Main Author: Husin, Alias
Format: Article
Language:English
English
Published: 1982
Online Access:http://psasir.upm.edu.my/id/eprint/2177/1/Phosphorus_Sorption_Pattern_Under_Controlled_Redox_Potential_For.pdf
http://psasir.upm.edu.my/id/eprint/2177/
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Institution: Universiti Putra Malaysia
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spelling my.upm.eprints.21772013-05-27T06:59:20Z http://psasir.upm.edu.my/id/eprint/2177/ Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil Husin, Alias Four samples of Crowley silt loam soil were weighed into a 2-liter flat-bottomed flasks. After the introduction of 0.4% ground rice straw, 0.01 M CaCl2 were added in each flask and the mixture stirred constantly by a magnetic stirrer to establish oxidized and reduced conditions. It took 13 days of continuous purging with nitrogen gas to obtain an Eh value of -220 mv. For the oxidized condition ordinary atmospheric air was bubbled into the flasks. Two levels of P (10 ppm and 100 ppm) in the form of Ca(H2P04)2H2 0 was applied to the soil mixture. It was found that the pH of the aerated treatment remained rather constant throughout the entire investigation whereas in the reduced ones the pH increased from 5.5 to neutrality. More P was adsorbed under the reduced condition than the oxidized ones. However, the effect was much more pronounced at the higher level of P fertilization. After 288 hours there were 55.9% and 90.2% adsorption of P in the oxidized and reduced conditions respectively. For 10 ppm P the maximum adsorption was obtained after a two-day period whereas for 100 ppm P. The graph levelled off after six days. 1982 Article NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/2177/1/Phosphorus_Sorption_Pattern_Under_Controlled_Redox_Potential_For.pdf Husin, Alias (1982) Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil. Pertanika, 5 (2). pp. 128-133. English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description Four samples of Crowley silt loam soil were weighed into a 2-liter flat-bottomed flasks. After the introduction of 0.4% ground rice straw, 0.01 M CaCl2 were added in each flask and the mixture stirred constantly by a magnetic stirrer to establish oxidized and reduced conditions. It took 13 days of continuous purging with nitrogen gas to obtain an Eh value of -220 mv. For the oxidized condition ordinary atmospheric air was bubbled into the flasks. Two levels of P (10 ppm and 100 ppm) in the form of Ca(H2P04)2H2 0 was applied to the soil mixture. It was found that the pH of the aerated treatment remained rather constant throughout the entire investigation whereas in the reduced ones the pH increased from 5.5 to neutrality. More P was adsorbed under the reduced condition than the oxidized ones. However, the effect was much more pronounced at the higher level of P fertilization. After 288 hours there were 55.9% and 90.2% adsorption of P in the oxidized and reduced conditions respectively. For 10 ppm P the maximum adsorption was obtained after a two-day period whereas for 100 ppm P. The graph levelled off after six days.
format Article
author Husin, Alias
spellingShingle Husin, Alias
Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil
author_facet Husin, Alias
author_sort Husin, Alias
title Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil
title_short Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil
title_full Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil
title_fullStr Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil
title_full_unstemmed Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil
title_sort phosphorus sorption pattern under controlled redox potential for crowley silt loam soil
publishDate 1982
url http://psasir.upm.edu.my/id/eprint/2177/1/Phosphorus_Sorption_Pattern_Under_Controlled_Redox_Potential_For.pdf
http://psasir.upm.edu.my/id/eprint/2177/
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