Field experiments were conducted at the University of Ibadan, Nigeria on the effect of cassava ( Manihot esculenta
Crantz) planting pattern and pruning methods on cassava yield and yield of associated crops, namely, maize ( Zea mays
L.), melon ( Colocynthis vulgaris
L.) and cowpea ( Vigna unguiculata
) in a cassava-based cropping system. Cassava planting patterns had significant effects on maize and melon yield in the 1995 but had no effects in 1996. Cowpea yield values under triangular planting pattern were 15 and 19% higher than regular planting pattern in 1995 and 1996, respectively. Its yield components differed only slightly under the two planting patterns. Number of cassava tubers and tuber weight plant-1 were superior under triangular planting pattern to regular planting pattern. The overall yield of cassava was, however, higher under regular planting pattern than triangular planting. The least cowpea yield and yield components were recorded under unpruned cassava. Yield and yield components of cassava reduced when pruned irrespective of the type of pruning method.