Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia
Soil acidity and low availability of P limit crop production in the highlands of Ethiopia. The objective of this study was to determine the P status, distribution and forms of inorganic P and relate them to selected chemical properties of eight representative acidic surface soil samples from Farta D...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2015/748390 |
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| author | Asmare Melese Heluf Gebrekidan Markku Yli-Halla Birru Yitaferu |
| author_facet | Asmare Melese Heluf Gebrekidan Markku Yli-Halla Birru Yitaferu |
| author_sort | Asmare Melese |
| collection | DOAJ |
| description | Soil acidity and low availability of P limit crop production in the highlands of Ethiopia. The objective of this study was to determine the P status, distribution and forms of inorganic P and relate them to selected chemical properties of eight representative acidic surface soil samples from Farta District. Soil pH (H2O) varied between 4.74 and 5.50. The moderate to high CEC suggests that besides kaolinite, the soils also contain expandable 2 : 1 clay minerals. Though the total P content was high, the available Olsen P content was very low or low in all soils except one. In most soils, the abundance of inorganic P fractions was as follows: P bound by oxalate extractable iron (Feox-P) > reductant soluble Fe-P > occluded Al-Fe-P > P bound by oxalate extractable aluminum (Alox-P) > calcium bound P (Ca-P). Olsen P had a very strong positive correlation (P≤0.01) with Alox-P (r=0.98), Feox-P (r=0.96), and oxalate extractable P (r=0.94). Though Fe bound P reserves were quite abundant and the degree of P saturation of Alox + Feox (median 3.3%) was moderate, the extremely low P saturation of Alox (median 0.5%) explains the P deficiency of the soils. |
| format | Article |
| id | doaj-art-a5aa256be02b4c91b8451e6d82550247 |
| institution | Kabale University |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied and Environmental Soil Science |
| spelling | doaj-art-a5aa256be02b4c91b8451e6d825502472025-02-03T06:01:31ZengWileyApplied and Environmental Soil Science1687-76671687-76752015-01-01201510.1155/2015/748390748390Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of EthiopiaAsmare Melese0Heluf Gebrekidan1Markku Yli-Halla2Birru Yitaferu3School of Natural Resources and Environmental Sciences, Haramaya University, P.O. Box 138, Dire Dawa, EthiopiaSchool of Natural Resources and Environmental Sciences, Haramaya University, P.O. Box 138, Dire Dawa, EthiopiaDepartment of Food and Environmental Sciences, University of Helsinki, P.O. Box 27, 00014 Helsinki, FinlandAmhara Regional Agricultural Research Institute, P.O. Box 527, Bahir Dar, EthiopiaSoil acidity and low availability of P limit crop production in the highlands of Ethiopia. The objective of this study was to determine the P status, distribution and forms of inorganic P and relate them to selected chemical properties of eight representative acidic surface soil samples from Farta District. Soil pH (H2O) varied between 4.74 and 5.50. The moderate to high CEC suggests that besides kaolinite, the soils also contain expandable 2 : 1 clay minerals. Though the total P content was high, the available Olsen P content was very low or low in all soils except one. In most soils, the abundance of inorganic P fractions was as follows: P bound by oxalate extractable iron (Feox-P) > reductant soluble Fe-P > occluded Al-Fe-P > P bound by oxalate extractable aluminum (Alox-P) > calcium bound P (Ca-P). Olsen P had a very strong positive correlation (P≤0.01) with Alox-P (r=0.98), Feox-P (r=0.96), and oxalate extractable P (r=0.94). Though Fe bound P reserves were quite abundant and the degree of P saturation of Alox + Feox (median 3.3%) was moderate, the extremely low P saturation of Alox (median 0.5%) explains the P deficiency of the soils.http://dx.doi.org/10.1155/2015/748390 |
| spellingShingle | Asmare Melese Heluf Gebrekidan Markku Yli-Halla Birru Yitaferu Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia Applied and Environmental Soil Science |
| title | Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia |
| title_full | Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia |
| title_fullStr | Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia |
| title_full_unstemmed | Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia |
| title_short | Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia |
| title_sort | phosphorus status inorganic phosphorus forms and other physicochemical properties of acid soils of farta district northwestern highlands of ethiopia |
| url | http://dx.doi.org/10.1155/2015/748390 |
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