Sustainable Management of Soil Potassium – A Crop Rotation Oriented Concept

1. Introduction

2. Potassium impact on crop plant productivity – Physiological backgrounds

3. Potassium as a water-stress ameliorative agent

3.1. Plant growth stages – Yield forming function of potassium

3.2. Impact of potassium on WUE – Maize as a case study

4. Soil potassium resources – K availability to crop plants

4.1. Soil K mining

4.2. Soil K pools

4.3. Factors affecting potential availability of the NEX-K to crops

5. Crop rotation – The background of soil fertility management

6. Crop rotation potassium balance – A strategic scale of K management

6.1. System of potassium fertilization – Key assumptions

6.2. Potassium balance sheet in crop rotation – An operational procedure

6.3. Determination of optimum soil K level

7. Conclusion

Author details

References