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Potassium buffering capacity of sandy soils from Thua Thien Hue Province, Central Vietnam, as related to soil properties

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Hoang, Thi Thai Hoa [UCL] Pham, Quang Tu [] Dufey, Joseph [UCL] Hoang Thai, Ninh [UCL]

(eng) Most agricultural production in central Vietnam relies on sandy soils distributed along the sea coast. Because of their low exchangeable potassium (K) and low cation exchange capacity (CEC), careful adjustment of K fertilization on these soils is needed to minimize K leaching. Quantity/intensity curves were established on 24 sandy soils from Thua Thien Hue Province from which K buffering capacity (PBC) was calculated and compared with basic soil properties. Potassium buffering capacity was found to correlate best with soil texture and only a little with humus content, although these two characteristics are responsible for CEC. A simple equation based on sand content, which is easier to determine than clay content, is proposed to calculate optimum exchangeable K level as a function of target K level in soil solution.

Document type Article de périodique (Journal article) – Article de vulgarisation
Publication date 2009
Language Anglais
Journal information "Communications in Soil Science and Plant Analysis" - Vol. 40, no. 21-22, p. 2658-2672 (2009)
Peer reviewed yes
Publisher Taylor & Francis Inc. ((United States) Philadelphia)
issn 0010-3624
e-issn 1532-2416
Publication status Publié
Affiliation UCL - AGRO/MILA - Département des sciences du milieu et de l'aménagement du territoire
Keywords 3660 ; 3661 ; 3662
Links
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Bibliographic reference Hoang, Thi Thai Hoa ; Pham, Quang Tu ; Dufey, Joseph ; Hoang Thai, Ninh. Potassium buffering capacity of sandy soils from Thua Thien Hue Province, Central Vietnam, as related to soil properties. In: Communications in Soil Science and Plant Analysis, Vol. 40, no. 21-22, p. 2658-2672 (2009)
Permanent URL http://hdl.handle.net/2078.1/72495