[Nitrogen. New methods to optimize the rates [Triticum aestivum, Emilia-Romagna]]

abonos nitrogenados analytical methods application rates azote azoto besoin nutritionnel concimi azotati dose d'application dosi di applicazione emilia romagna fertilisation fertilizer application metodi analitici necesidades de nutrientes nitrogen nitrogen fertilizers nutritional requirements progetti di ricerca projet de recherche research projects technique analytique triticum aestivum