Literature sources used for the development of N-Expert (chronologically ordered) Lorenz, H.P., Schlaghecken, J., Engl, G. 1989. Ordnungsgemäße Stickstoffversorgung im Freiland-Gemüsebau nach dem Kulturbegleitenden Nmin-Sollwerte(KNS)-System. Ministerium Landwirtschaft, Weinbau Forsten Rheinland-Pfalz,...
The Nmin System , the crop accompanying Nmin System (KNS) , and N-Expert are three methods for determining fertilizer requirement of field vegetables. These three systems have been developed sequentially....