Contribution of litter and nitrogen to soil under Pseudosamanea guachapele and Eucalyptus grandis plantations

The litter deposition and nitrogen content on litter leaves were studied on seven years old pure and 1:1 mixed stand of guachapele (Pseudosamanea guachapele) and eucalyptus (Eucalyptus grandis). There was no difference in litter deposition among species in pure or mixed crop: 12.75 Mg ha(-1) for guachapele, 11.84 Mg ha(-1) for the eucalyptus and 12.44 Mg ha(-1) for the mixed crop. The legume three contribution to the mixed stand was only 11% of the total, but reduced by 0.3 year the time of residue residence on the soil.