Journal article

THE IMPORTANCE OF THE POTASSIUM BUFFER POWER ON THE CRITICAL POTASSIUM LEVEL IN SOILS


Authors listMENGEL, K; BUSCH, R

Publication year1982

Pages27-32

JournalSoil Science

Volume number133

Issue number1

ISSN0038-075X

eISSN1538-9243

DOI Linkhttps://doi.org/10.1097/00010694-198201000-00005

PublisherLippincott, Williams & Wilkins


Abstract
The relationship between the K+ buffer power and the critical K+ concentration of the soil solution was studied in pot experiments with Italian ryegrass. Critical K+ concentration is defined as that K+ concentration of the bulk soil solution below which plants respond by a yield increase when K fertilizer is applied. The K+ concentration of the soil solution was measured indirectly by means of the electro-ultrafiltration technique. The K+ buffer power was obtained by plotting the exchangeable K+ against the K+ concentration of the bulk soil solution. The steepness of the resulting curve reflects the K+ buffer power. Nine soils differing widely in clay content, CEC [cation exchange capacity] and K+ buffer power were used for the investigation. Close correlation (r2 = 0.908) was found between the K+ buffer power and the critical K+ concentration of the soil solution. This relationship was reflected by a hyperbola (y = c/x), indicating that the critical K+ concentration was lower the higher the K+ buffer power was.



Citation Styles

Harvard Citation styleMENGEL, K. and BUSCH, R. (1982) THE IMPORTANCE OF THE POTASSIUM BUFFER POWER ON THE CRITICAL POTASSIUM LEVEL IN SOILS, Soil Science, 133(1), pp. 27-32. https://doi.org/10.1097/00010694-198201000-00005

APA Citation styleMENGEL, K., & BUSCH, R. (1982). THE IMPORTANCE OF THE POTASSIUM BUFFER POWER ON THE CRITICAL POTASSIUM LEVEL IN SOILS. Soil Science. 133(1), 27-32. https://doi.org/10.1097/00010694-198201000-00005



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