J.Y. Asibuo and P. Osei-Bonsu
Time of introducing component crops in a cassava/groundnut intercropping trials were conducted between 1996 and 1998 on a Lixisol at Ejura (1° 22‘W and 7°23‘N), in Ghana to investigate the best time to plant the crops for optimum yield. Cassava cultivar ‘Akosua tuntum’ was planted into groundnut ‘Dagomba’ at 0, 14, 28, 42 days after planting, groundnut was also planted into cassava at 14, and 28 DAP; there were sole crops as control. The results of the study showed that there were significant differences (p< 0.05) between the groundnut pod yields There were significant differences between the fresh root yields of cassava. Cassava root yield decreased by 58% and 39% when planted into groundnut at 42 DAP in 1996 and 1997 respectively. There were more roots when groundnut was planted into cassava and the roots were also bigger. The stem diameter was significantly correlated with fresh tuber yield (r = 82.8, p = 0.001 in 1996 and r = 77.8; p = 0.001 in 1997). The land equivalent ratio values ranged trom 1.53 to 1.87 indicating an advantage of intercropping over sole cropping. The advantage of intercropping however decreased as the time of introducing cassava into groundnut was delayed up to 42 days after planting.