Therefore,
the application of N significantly decreased the ratio. Sainju et al.
(2002) showed that the C:N ratio was lower in leguminosae cover
crops as N fixating plant. The rye (A. sativa L.) crop and interaction
between cover crops and year on soil C:N ratio was significant
suggesting variation of C and N contents contributed by the cover
crops and their rate of decomposition from year to year can alter