Evaluation of direct and indirect methods used to determine crop coefficient and crop evapotranspiration of sugar beet plants grown under fayoum conditions
EL-Samnoudi, I., Ibrahim, A., Abd EL Tawwab, A., Abdou, N. (2021). Evaluation of direct and indirect methods used to determine crop coefficient and crop evapotranspiration of sugar beet plants grown under fayoum conditions. EKB Journal Management System, 35(3), 495-504. doi: 10.21608/fjard.2021.222930
Ibrahim EL-Samnoudi; Abd El-Aty Ibrahim; Ahmed Abd EL Tawwab; Nasr Abdou. "Evaluation of direct and indirect methods used to determine crop coefficient and crop evapotranspiration of sugar beet plants grown under fayoum conditions". EKB Journal Management System, 35, 3, 2021, 495-504. doi: 10.21608/fjard.2021.222930
EL-Samnoudi, I., Ibrahim, A., Abd EL Tawwab, A., Abdou, N. (2021). 'Evaluation of direct and indirect methods used to determine crop coefficient and crop evapotranspiration of sugar beet plants grown under fayoum conditions', EKB Journal Management System, 35(3), pp. 495-504. doi: 10.21608/fjard.2021.222930
EL-Samnoudi, I., Ibrahim, A., Abd EL Tawwab, A., Abdou, N. Evaluation of direct and indirect methods used to determine crop coefficient and crop evapotranspiration of sugar beet plants grown under fayoum conditions. EKB Journal Management System, 2021; 35(3): 495-504. doi: 10.21608/fjard.2021.222930

Evaluation of direct and indirect methods used to determine crop coefficient and crop evapotranspiration of sugar beet plants grown under fayoum conditions

Fayoum Journal of Agricultural Research and Development
Article 5, Volume 35, Issue 3, September 2021, Page 495-504  XML PDF (1.47 MB)
Document Type: Research articles.
DOI: 10.21608/fjard.2021.222930
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Authors
Ibrahim EL-Samnoudi1; Abd El-Aty Ibrahim1; Ahmed Abd EL Tawwab2; Nasr Abdou2
1Soils and Water Department, Faculty of Agriculture, Fayoum University, Fayoum 63514, Egypt
2Soils and Water Department, Faculty of Agriculture, Fayoum University, Fayoum 63514, Egypt A
Abstract
With increasing water scarcity, the determination of reference evapotranspiration ETo
and crop coefficient (Kc) is a critical factor in determining the crop water demand ETc.
Therefore, the current investigation aimed to evaluate and compare the estimated sugar beet
crop evapotranspiration (ETc) values computed by different empirical methods (e.g.
Hargreaves, Penmen-Monteith and Class-A pan) with the measured actual sugar beet
evapotranspiration (ETa). To determine the ETa for sugar beet crop field experiment was
conducted during two growing seasons (2019/2020 and 2020/2021) in Demo farm, Faculty of
Agriculture, Fayoum University, Egypt. Sugar beet seeds (Beta vulgaris L., Baraca) was
planted in 1st October and harvested in April during two successive winter seasons. Irrigation
water was applied when the soil moisture content was depleted by 30% of available water. All
the obtained results were statistically analyzed to evaluate the best method for estimating the
reference evapotranspiration and suitable for optimizing the irrigation management practices
for sugar beet plants grown under arid and semi-arid conditions. The obtained results
concluded that among the used methods (Hargreaves, Penmen-Monteith and Class A pan) for
estimating sugar beet crop evapotranspiration (ETc) in comparison with ETa measured values,
the Penmen-Monteith performed well in describing the ETc and Kc for sugar beet
plants
grown in Fayoum Governorate, Egypt.
Keywords
Sugar beet; crop evapotranspiration; reference evapotranspiration; crop coefficient
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