1. Managing Uncertainty in Site-Specific Management: What is the Best Model?;Adams;Precision Agric.,2001
2. Nitrate leaching from organic arable crop rotations: effects of location, manure and catch crop;Askegaard;Soil Use Manage.,2005
3. Asmus, F., Hermann, V., 1977. Reproduktion der organischen Substanz des Bodens. Fortschrittsber. f. Landwirtsch. Nahrungsgüterwirtsch. 15. Akademie der Landwirtschaftswissenschaften der DDR, Institut für Landwirtschaftliche Information und Dokumentation, Berlin, pp. 5–55.
4. Interplanting of non-legumes into faba bean (Vicia faba L.) to reduce the risk of nitrate contamination of ground water;Aufhammer;Eur. J. Agron.,1992
5. Organic farming on large farms with special reference to Eastern Germany: management strategies, environmental effects and economic aspects;Bachinger,2000