A - Papers appearing in refereed journals
Bar-Yosef, B., Magen, H., Johnston, A. E. and Kirkby, E. A. 2015. Potassium fertilization: paradox or K management dilemma? Renewable Agriculture And Food Systems. 30 (2), pp. 115-119.
|Authors||Bar-Yosef, B., Magen, H., Johnston, A. E. and Kirkby, E. A.|
In 2014, Khan et al. presented evidence that soil exchangeable K (Exch-K) increases over time without addition of potassium (K) to the soil despite the removal of K in crops on a soil rich in montmorillonite and illite. The authors term this behavior ‘The potassium paradox’. From their review of the literature, the authors also report a lack of crop response to potassium chloride (KCl) fertilization. Close evaluation of these findings reveals that their observations can be interpreted and predicted using current knowledge of K in soil chemistry and its uptake by plants, and there is no paradox in K behavior in the soil–plant system. There is also no evidence of a detrimental effect of KCl on crop yield or quality. Their conclusion that the widely used Exch-K soil test is inadequate for managing K fertilization is discussed and some possible modifications to improve its performance are included. We believe that measurement of Exch-K is an essential and valuable tool and its use should be continued, along with improvements in recommending K fertilizer application.
|Year of Publication||2015|
|Journal||Renewable Agriculture And Food Systems|
|Journal citation||30 (2), pp. 115-119|
|Digital Object Identifier (DOI)||doi:10.1017/S1742170514000295|
|Open access||Published as ‘gold’ (paid) open access|
All rights reserved
File Access Level
|Online||18 Feb 2015|
|Publication process dates|
|Accepted||17 Jul 2014|
|Publisher||Cambridge University Press (CUP)|
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