Soil Guideline
Sustainable Nitrogen Management in Agricultural Practice
91 pages , 11 figures, 20 tables (December 2003)
Contents:
Introduction
Nitrogen cycle
Inputs
Outputs
Methods of estimating the nitrogen fertiliser requirements of crops
Methods based on experience and observations
Calculation-based methods
Methods based on soil and plant analyses
Nitrogen budget
Managing fertilisation with the nitrogen budget
Conclusion
Nitrogen Management - Prevention of nitrogen leaching
Improved fertiliser management
Nitrification Inhibitors
Green manures (or trap crops)
Making Effective Use of Crop Residues
Choice of crop
Irrigation management
Manure Management
Monitoring nitrogen nutrition
Keys to managing nitrogen
Success validation
Introduction
Balancing nitrogen fluxes
Course of action in N consulting
Definition of a nitrogen management priority program
N-consulting scheme
Appendices:
Appendix I : Method for soil nitrate extraction
Appendix II: Method for tissue nitrate extraction
Appendix III: Quantification using the Reflectoquant reflectometer
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