Economic evaluation of using mulch from multi-purpose trees in maize-basedproduction systems in south-western Nigeria

Cutting and carrying of mulch from established tree plots is an alternative to in situ mulch in agroforestry systems. Through the cut-and-carry method , the undesirable effects of tree-crop competition characterized by in situ mulching can be avoided. An economic evaluation of the cut-and-carry metho d of providing nutrients for maize production was carried out based on inve stigations in south-western Nigeria. The results showed that the use of mul ch from multipurpose trees (MPTs) through the cut-and-carry method contribu ted to higher maize grain yields than those obtained with fertilizer or in the untreated controls. However, because of high labour requirements and sc arcity of land in the study area, providing nutrients for crop production b y this method is unprofitable both in the short and the long term. This may serve as a constraint for the adoption of this technology by farmers. Alte rnative options requiring less labour and land requirements should be inves tigated in the quest to replace shifting cultivation.