Data di Pubblicazione:
1982
Citazione:
Evidence of potassium fixation through mono
and divalent ion exchange / Dixit, S.; Melis, Pietro; Gessa, Carlo Emanuele; Premoli, Alessandra Maria. - In: STUDI SASSARESI. SEZIONE 3: ANNALI DELLA FACOLTÀ DI AGRARIA DELL'UNIVERSITÀ DI SASSARI. - ISSN 0562-2662. - 29:(1982), pp. 141-149.
Abstract:
Mono and divalent cation exchange in some algerian major soil types was studied following empirical ap·
proach. The reaction 2 Na-Soil + Ca2+= Ca-Soil + 2 Na+did not show complete reversibility possibly
due to high Ca selectivity of soils. The soils exhibited divalent over monovalent ion affinity but for monovalent
ion exchange the affinity in few cases remained almost the same. Gapon's equation did not seem
to describe Ca-K exchange very satisfactorily because exchangeable potassium ratio (EKR) and potassium
adsorption ratio (KAR) are not related linearly. The latter seems to be due to potassium fixing ten·
dency of soils investigated.
proach. The reaction 2 Na-Soil + Ca2+= Ca-Soil + 2 Na+did not show complete reversibility possibly
due to high Ca selectivity of soils. The soils exhibited divalent over monovalent ion affinity but for monovalent
ion exchange the affinity in few cases remained almost the same. Gapon's equation did not seem
to describe Ca-K exchange very satisfactorily because exchangeable potassium ratio (EKR) and potassium
adsorption ratio (KAR) are not related linearly. The latter seems to be due to potassium fixing ten·
dency of soils investigated.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
Soils; potassium fixation; Algeria
Elenco autori:
Dixit, S.; Melis, Pietro; Gessa, Carlo Emanuele; Premoli, Alessandra Maria
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