Rajan, S.S.S. (1973) Phosphorus adsorption characteristics of Hawaiian soils and their relationships to equilibrium phosphorus concentrations required for maximum growth of millet. Plant and Soil, 39 (3). pp. 519-532.
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Abstract
Phosphorus adsorption isotherms were constructed for six Latosols and one calcareous soil from Hawaii which differed greatly in their phosphorus adsorption capacities. Equilibration was in 0.01M CaC12 at 25°C for 6 or 8 days. P adsorption properties of the soils were charaeterised employing the linear form of Langmuir's equation and also by calculating the amount of P adsorbed between equilibrium concentrations of 0.25 to 0.35 ppm (estimates of P buffering capacities), following the procedure of Ozanne and Shaw 1~. The isotherms of all the soils were found to fit the Langmuir equation at low equilibrium concentrations ( < 5 ppm) and the P adsorption maxima ranged from 520 to 10 500 ppm. The buffering capacity estimates correlated closely (r = 0.950) with the adsorption maxima of soils. However, in two soils, the estimates were much lower than expected from their adsorption maxima.
| Item Type: | Article |
|---|---|
| Author Affiliation: | Hawaii University, Honolulu, USA |
| Subjects: | Plant Production > Production Practices Plant Protection > Pesticides Soil Science and Microbiology > Soil Sciences |
| Divisions: | Millet |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 15 Dec 2011 06:06 |
| Last Modified: | 15 Dec 2011 06:06 |
| Official URL: | http://dx.doi.org/10.1007/BF00264170 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/2835 |
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