Toolbox of cost-effective strategies for on-farm reductions in N losses to water - QUEMADA SAENZ-BADILLOS, MIGUEL (Investigador principal (IP)); GABRIEL PÉREZ, JOSÉ LUIS (Participante); VALLEJO GARCIA, ANTONIO (Participante); GARRIDO COLMENERO, ALBERTO (Participante); HONTORIA FERNANDEZ, CHIQUINQUIRA (Participante) (2009)