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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| Format: | Article |
| Language: | English English |
| Published: |
1982
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| Online Access: | http://psasir.upm.edu.my/id/eprint/2177/ http://psasir.upm.edu.my/id/eprint/2177/1/Phosphorus_Sorption_Pattern_Under_Controlled_Redox_Potential_For.pdf |
| _version_ | 1848839173287444480 |
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| author | Husin, Alias |
| author_facet | Husin, Alias |
| author_sort | Husin, Alias |
| building | UPM Institutional Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-15T07:07:14Z |
| format | Article |
| id | upm-2177 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T07:07:14Z |
| publishDate | 1982 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-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 |
| spellingShingle | Husin, Alias Phosphorus Sorption Pattern Under Controlled Redox Potential For Crowley Silt Loam Soil |
| title | 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_short | 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 |
| url | http://psasir.upm.edu.my/id/eprint/2177/ http://psasir.upm.edu.my/id/eprint/2177/1/Phosphorus_Sorption_Pattern_Under_Controlled_Redox_Potential_For.pdf |