Irrigation & Drainage Systems Engineering

Ethiopian Institute of Agricultural Research (EIAR), Werer Agricultural Research Center, P. O. Box 2003, Addis Ababa, Ethiopia

Publications

• Research   
  Determination Crop Coefficients and Water Requirement of Onion by Using Lysimeter at Werer, Middle Awash Valley of Ethiopia
  Author(s): Nigusie Abebe*, Elias Kebede, Yonas Derese, Fikadu Robi and Kebede Nanesa
  
  The development of crop coefficients (KC), the ratio of crop evapotranspiration (ETc) to reference evapotranspiration (ETo) is important for estimating irrigationwater requirements in relation to specific crop phenological development. This research was conducted to determine growth-stage-specific Kc and crop water use for onion at Werer Agricultural Research Center, Middle Awash Valley Ethiopia during the main season (July–October) and during cool cropping seasons (March–June) from 2012-2015. Three non weighing lysimeters of 1.6 m x 1.6 m in surface area and 2 m deep were used to measure crop water use and local weather data were used to determine the reference evapotranspiration (ETo).The results showed that the obtained Kc values for main cropping season planted onion during initial, crop development, mid season and late-season stages were 0.57, 0.78, 1.03 and 0.77 resp.. Read More»
  DOI: 10.37421/2168-9768.2021.10.261

  Abstract HTML PDF