Tillage systems significantly affected dry matter production in
2006, 2007 and 2008, but not in 2009, the wettest year (Fig. 3). N
fertilization significantly increased dry matter production at several
growth stages in 2006, 2007 and 2009, but not in 2008, the driest
year. In 2008, the interaction between N fertilization and tillage
system was significant at various growth stages. N fertilization
usually increased crop growth under NT, by an average of 50% on ZN,
while it did not lead to any response under CT.
Tillage systems significantly affected dry matter production in2006, 2007 and 2008, but not in 2009, the wettest year (Fig. 3). Nfertilization significantly increased dry matter production at severalgrowth stages in 2006, 2007 and 2009, but not in 2008, the driestyear. In 2008, the interaction between N fertilization and tillagesystem was significant at various growth stages. N fertilizationusually increased crop growth under NT, by an average of 50% on ZN,while it did not lead to any response under CT.
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