Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorus
Release of phosphorus, aluminium and iron by a modified Chang and Jackson procedure was studied in five mineral soils. Quantities of aluminium and iron released during the procedure and extracted by acid ammonium oxalate were compared. The extractability of P, Al and Fe by 1 M NH4CI and that of Al a...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Scientific Agricultural Society of Finland
1987-04-01
|
| Series: | Agricultural and Food Science |
| Online Access: | https://journal.fi/afs/article/view/72256 |
| _version_ | 1818163568669884416 |
|---|---|
| author | Raina Niskanen |
| author_facet | Raina Niskanen |
| author_sort | Raina Niskanen |
| collection | DOAJ |
| description | Release of phosphorus, aluminium and iron by a modified Chang and Jackson procedure was studied in five mineral soils. Quantities of aluminium and iron released during the procedure and extracted by acid ammonium oxalate were compared. The extractability of P, Al and Fe by 1 M NH4CI and that of Al and Fe by alkaline 0.5 M NH4F was poor. Proportions of P extracted by 0.5 M NH4F (0.2—10.4 mmol/kg soil) and 0.1 M NaOH (0.1— 9.8 mmol/kg soil) were related to the molar ratio of oxalate-extractable iron and aluminium. P extracted by 0.25 M H2SO4 amounted to 2.1—12.2 mmol/kg soil. Al extracted by 0.1 M NaOH (7—174 mmol/kg soil) and 0.25 M H2SO4 (17—112 mmol/kg soil) amounted to 55—94 % and 16—245 % of oxalate-extractable Al, respectively. Fe released by 0.1 M NaOH (1—10 mmol/kg soil) and 0.25 M H2SO4 (30—196 mmol/kg soil) amounted to 1—13 % and 62—272 % of oxalate-extractable Fe, respectively. In total, 91—309 % of oxalate-extractable Al and 70—285 % of oxalate-extractable Fe were released by NaOH and H2SO4. |
| first_indexed | 2024-12-11T16:51:38Z |
| format | Article |
| id | doaj.art-c7c0512a4d944f8b8015adb734cd07b2 |
| institution | Directory Open Access Journal |
| issn | 1459-6067 1795-1895 |
| language | English |
| last_indexed | 2024-12-11T16:51:38Z |
| publishDate | 1987-04-01 |
| publisher | Scientific Agricultural Society of Finland |
| record_format | Article |
| series | Agricultural and Food Science |
| spelling | doaj.art-c7c0512a4d944f8b8015adb734cd07b22022-12-22T00:58:05ZengScientific Agricultural Society of FinlandAgricultural and Food Science1459-60671795-18951987-04-01592Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorusRaina Niskanen0University of Helsinki, Department of Agricultural Chemistry, SF-00710 HELSINKI, Finland Release of phosphorus, aluminium and iron by a modified Chang and Jackson procedure was studied in five mineral soils. Quantities of aluminium and iron released during the procedure and extracted by acid ammonium oxalate were compared. The extractability of P, Al and Fe by 1 M NH4CI and that of Al and Fe by alkaline 0.5 M NH4F was poor. Proportions of P extracted by 0.5 M NH4F (0.2—10.4 mmol/kg soil) and 0.1 M NaOH (0.1— 9.8 mmol/kg soil) were related to the molar ratio of oxalate-extractable iron and aluminium. P extracted by 0.25 M H2SO4 amounted to 2.1—12.2 mmol/kg soil. Al extracted by 0.1 M NaOH (7—174 mmol/kg soil) and 0.25 M H2SO4 (17—112 mmol/kg soil) amounted to 55—94 % and 16—245 % of oxalate-extractable Al, respectively. Fe released by 0.1 M NaOH (1—10 mmol/kg soil) and 0.25 M H2SO4 (30—196 mmol/kg soil) amounted to 1—13 % and 62—272 % of oxalate-extractable Fe, respectively. In total, 91—309 % of oxalate-extractable Al and 70—285 % of oxalate-extractable Fe were released by NaOH and H2SO4.https://journal.fi/afs/article/view/72256 |
| spellingShingle | Raina Niskanen Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorus Agricultural and Food Science |
| title | Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorus |
| title_full | Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorus |
| title_fullStr | Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorus |
| title_full_unstemmed | Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorus |
| title_short | Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorus |
| title_sort | release of phosphorus aluminium and iron in fractionation of inorganic soil phosphorus |
| url | https://journal.fi/afs/article/view/72256 |
| work_keys_str_mv | AT rainaniskanen releaseofphosphorusaluminiumandironinfractionationofinorganicsoilphosphorus |