Citation
Abdul Rashid Ahmad, . and Ismail Abu Bakar, . Potassium quantity and intensity variations of soils under anaerobic condition in relation to their mineralogical properties. pp. 123-130. ISSN 0128-0686
Abstract
Two soils with different mineralogical characteristics were subjected to anaerobic condition and their quantity-intensity variations were monitored with time up to 45 days. Selangor series with an appreciable amount of 2:1 clays showed higher capacity for exchangeable K as compared with Sendong series which had only very small amount of 2:1 clay. At the onset of reduction the quantity-intensity variation indicated that negative charges were exposed when Fe-surface complex dissolved. This increased the exchange capacity for K. Longer anaerobic condition could reduce the octahedral Fe3 to Fe2. The redistribution of negative charges in the layer lattices of the 2:1 clays could enhance the fixation of K by layer collapse or adsorption of K on higher energy sites on the clay surfaces. With further reduction Fe or Al hydroxides polymers could form in the interlayer position of the clays which released more K to the exchangeable sites.
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Abstract
Two soils with different mineralogical characteristics were subjected to anaerobic condition and their quantity-intensity variations were monitored with time up to 45 days. Selangor series with an appreciable amount of 2:1 clays showed higher capacity for exchangeable K as compared with Sendong series which had only very small amount of 2:1 clay. At the onset of reduction the quantity-intensity variation indicated that negative charges were exposed when Fe-surface complex dissolved. This increased the exchange capacity for K. Longer anaerobic condition could reduce the octahedral Fe3 to Fe2. The redistribution of negative charges in the layer lattices of the 2:1 clays could enhance the fixation of K by layer collapse or adsorption of K on higher energy sites on the clay surfaces. With further reduction Fe or Al hydroxides polymers could form in the interlayer position of the clays which released more K to the exchangeable sites.
Additional Metadata
| Item Type: | Article |
|---|---|
| Additional Information: | 2 graphs; 3 tables; 17 ref. Summary (En Malay) |
| AGROVOC Term: | MALASIA PENINSULAR |
| AGROVOC Term: | POTASIO |
| AGROVOC Term: | SUELO ARCILLOSO/ PROPIEDADES FISICO-QUIMICAS SUELO |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:56 |
| URI: | http://webagris.upm.edu.my/id/eprint/20221 |
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