African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 762

Full Length Research Paper

Effects of fertilizer and cassava-legume cropping systems on root yields in two agro-ecological zones of Ghana

Marcus Tobodawolo Jones
  • Marcus Tobodawolo Jones
  • Central Agricultural Research Institute (CARI), Suakoko District, Bong County, P .O. Box 3929, 1000 Monrovia 10, Liberia.
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Roland Nuhu Issaka
  • Roland Nuhu Issaka
  • Council for Scientific and Industrial Research - Soil Research Institute, Kwadaso – Kumasi, Ghana.
  • Google Scholar

  •  Received: 27 April 2017
  •  Accepted: 22 August 2017
  •  Published: 31 October 2017


Cassava is an important food crop in small-holder farming systems in Ghana. Due to the limited use of organic and inorganic inputs, soil fertility becomes a major problem in cassava production systems. A study was conducted at the Soil Research Institute, Kwadaso, in the Forest Agro-ecological zone and the Wenchi Agricultural Station in the Forest-Savannah Transitional zone. The fertilizer rates were 0:0:0, 15:15:15 and 30:30:30 N-P2O5-K2O kg/ha. Cowpea, soybean, and groundnuts were the legumes and cassava was either sole cropped or intercropped with a legume. The objective was to determine the effect of fertilizer and cassava-legume cropping systems on root and grain yields in the two agro-ecological zones. Data on soil characteristics, biomass, grain, and root yields were collected. Growth and yield data were subjected to ANOVA and mean separated using LSD (P < 0.05). Fertilizer application did not influence cassava root yields at Kwadaso but different cropping systems significantly influenced root yield. Cassava-groundnut intercrop gave the highest root yield of 70.2 t/ha. At Wenchi, both cropping system and fertilizer did not affect root yield. This study shows that intercropping cassava with groundnut or cowpea is a good option in improving cassava production.


Key words:  Agro-ecological zone, cassava-legume intercrop, fertilizer, root yield.