vermicompost had an intermediate impact and the lowest yield was measured for the compost treatment (P < 0.05). However, no difference was measured between these two organic treatments in the final maize planting (P > 0.05). Although plant yield was not influenced by earthworm activity for the control and vermicompost treatments (P > 0.05 in all case), earthworms improved tomato yield and decreased the yield of the second maize crop (P < 0.05) for the compost treatment.