Economical aspects of winter wheat irrigation in the new economic conditions of the year 1991

application rates azote catch cropping costos costs crop yield csfr cultivo intermedio cultivos de invierno culture d'hiver dose d'application dose d'irrigation dosis de riego fertilisation fertilizer application irrigation irrigation rates nitrogen profitability rendement des cultures rendimiento de cultivos rentabilidad rfcs rfts riego triticum aestivum winter crops