Crop Water Use And Productivity For Onion (Allium Cepa) In The Bontanga Irrigationscheme Of Northern Region Of Ghana

  • S Abdul-Ganiyu
  • M K Amaanatu
  • J K Korese


Onion is one of the most important vegetable crops cultivated in the Bontanga Irrigation Scheme during the dry season. The crop performance is sensitive to irrigation practices; however, there is little information on water productivity for the crops cultivated by the Scheme. The study was therefore conducted to determine the crop water use and productivity of onion cultivated during the dry season. Historic dry season yields of okra and crop management practice information were obtained from the Scheme while climatic data was obtained from the Meteorological Agency of Tamale for the determination of crop water requirement and crop water productivity. The results indicated that onion requires 549 mm of water for its growth, development and maturity; the average yield offresh okra fruits was 11.3 t/ha while the average water productivity was 2.19 kg/m3 in the Scheme. Efficient water application with right irrigation schedule would improve yield