Table 7: Correlation between yield and amount of nutrients for the grain in ten corn cultivars representing five different technological levels in harvesting in 2006 and 2007, at Rolandia County, Paraná State, Brazil.

CNPKCaMgCuFeMnZn

20060.87**0.88**0.86**0.85**0.62**0.84**0.61**0.69**0.72**0.85**
20070.99**0.98**0.79**0.75**0.43*0.68**0.34*0.63**0.68**0.70**

; .