00575nam a2200145 a 450000100080000000500110000800800410001910000250006024500680008526000360015330000090018952002050019865300180040365300080042116831972008-07-22       1991    bl uuuu     u0uu1 u    #d1 aIFA (Paris, Franca).  aA code of best agricultural practices to optime fertilizer use.  aParis: IFA/EFMA, [1991?].c1991  a4 p.  aObjectives of the code. Crop nutrition and plant nutrient loss from soils. The quantities of plant nutrients to be applied. Timing and method of application. Type of fertilizer to be applied. General.  aFertilizantes  aUso