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Fig. 7. Relative cumulative mass loss as a function of the cumulative drain discharge for the different treatments in 1998 and 1999. Cow manure conventional (CM–CT) ({diamondsuit}) and reduced (CM–RT) ({diamond}) tillage; pig slurry conventional (PS–CT) ({blacksquare}) and reduced (PS–RT) ({square}) tillage; mineral fertilizer conventional (MF–CT) (•) and reduced (MF-RT) ({circ}) tillage.