Seasonal and long-term changes in soil potassium under model conditions

abonos application rates contenido de agua en el suelo dose d'application engrais npk engrais organique fertilizantes npk npk fertilizers potasio potassium procesos de transporte en el suelo rotation culturale rotational cropping soil temperature soil transport processes soil water content solanum tuberosum temperatura del suelo teneur en eau du sol transport dans le sol triticum aestivum