|
in
| Title : |
Phosphorus speciation in nitisol from ethiopian highlands |
| Material Type: |
printed text |
| Authors: |
H.R Upadhayay, Author ; S.C França, Author ; P Boeckx, Author |
| Pagination: |
216-232 p. |
| Languages : |
English (eng) |
| Keywords: |
Inner-sphere complex, phosphorus adsorption capacity (PAC), pool, Sesquioxides. |
| Abstract: |
Phosphorus (P) is considered as a primary limiting nutrient for faba bean (Vicia faba L.) production in Nitisol (Western and South-western Ethiopian highlands) due to strong adsorption of P to Al and Fe (hydr)oxides. The objective of this research was to differentiate the P into various pools on the basis of its plant availability with respect to different depths. The soil was collected in the bulk as well as at three depths from an agricultural field. A modified Hedley sequential P fractionation was carried out to differentiate phosphorus into different fractions. Sum of all the P fractions [Pt(sum)] ranged from 648 to 1024 mg P kg-1 at 25 and 5 cm depth, respectively. Concentration of Fe in the soils extracted via dithionite-citrate (Fed) ranged from 37 to 41 g kg-1. The amounts of Al extractable by dithionite-citrate (Ald) and ammonium-oxalate (Alox) were not different with depth and had an average value of 3.13 and 2.31 g kg-1 respectively up to 30 cm depth……………………. |
| Link for e-copy: |
http://elibrary.narc.gov.np/?r=2107 |
in
Phosphorus speciation in nitisol from ethiopian highlands [printed text] / H.R Upadhayay, Author ; S.C França, Author ; P Boeckx, Author . - [s.d.] . - 216-232 p. Languages : English ( eng) | Keywords: |
Inner-sphere complex, phosphorus adsorption capacity (PAC), pool, Sesquioxides. |
| Abstract: |
Phosphorus (P) is considered as a primary limiting nutrient for faba bean (Vicia faba L.) production in Nitisol (Western and South-western Ethiopian highlands) due to strong adsorption of P to Al and Fe (hydr)oxides. The objective of this research was to differentiate the P into various pools on the basis of its plant availability with respect to different depths. The soil was collected in the bulk as well as at three depths from an agricultural field. A modified Hedley sequential P fractionation was carried out to differentiate phosphorus into different fractions. Sum of all the P fractions [Pt(sum)] ranged from 648 to 1024 mg P kg-1 at 25 and 5 cm depth, respectively. Concentration of Fe in the soils extracted via dithionite-citrate (Fed) ranged from 37 to 41 g kg-1. The amounts of Al extractable by dithionite-citrate (Ald) and ammonium-oxalate (Alox) were not different with depth and had an average value of 3.13 and 2.31 g kg-1 respectively up to 30 cm depth……………………. |
| Link for e-copy: |
http://elibrary.narc.gov.np/?r=2107 |
|
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