@article{Mohamed E Abuarab_Salma M Hafez_Mohamed M Shahein_Ahmed M Hassan_Mohamed BI El-Sawy_Mohamed M El-Mogy_Emad A Abdeldaym_2020, title={Irrigation scheduling for green beans grown in clay loam soil under a drip irrigation system}, volume={46}, url={https://watersa.net/article/view/9070}, DOI={10.17159/wsa/2020.v46.i4.9070}, abstractNote={<p>An experimental field trial was conducted at El-Ayat, El-Giza Governorate, Egypt (latitude 30°11´13"N, longitude 31°41´38"E, and mean altitude 74 m above sea level) during the growing season of 2017 and 2018. The study aimed to assess the suitable irrigation interval and applied water volume for drip-irrigated green beans, based on water production functions and water use–yield relationships. The field trial was arranged in a split-plot design with 3 irrigation intervals (F<sub>1</sub>, F<sub>2</sub> and F<sub>3</sub> irrigation events, once every 1, 2 and 3 days, respectively) and 3 irrigation regimes (I<sub>1</sub>: 1.00, I<sub>2</sub>: 0.80, and I<sub>3</sub>: 0.60 of the crop evapotranspiration, ET<sub>c</sub>). The results showed that the yield and water use efficiency (WUE) increased with increasing irrigation interval. Maximum and minimum yield of 12 030 and 4 879 kg∙ha<sup>-1</sup> were obtained in F<sub>1</sub>I<sub>2</sub> and F<sub>3</sub>I<sub>3</sub> treatment, respectively, in the winter season of 2017, and were 12 364 and 4 678 kg∙ha<sup>-1</sup> for the corresponding treatments in the winter season of 2018. WUE ranged from 56.55 kg∙ha<sup>-1</sup>∙mm<sup>-1</sup> in F<sub>1</sub>I<sub>2</sub> to 23.80 kg∙ha<sup>-1</sup>∙mm<sup>-1</sup> in F<sub>3</sub>I<sub>3</sub>. Plant growth parameters were significantly affected by the irrigation schedule. The highest plant growth parameters were obtained under F<sub>1</sub> and F<sub>2</sub>. The seasonal yield response factors (<em>k<sub>y</sub></em>) were 0.845 and 0.856 in 2017 and 2018, respectively. The relationship between yield and seasonal crop ET was best explained by a power function for all irrigation schedules for both growing seasons. It is recommended that the F<sub>1</sub>I<sub>2</sub> irrigation treatment is the suitable one for green beans grown under field conditions, in order to achieve the highest yield and WUE.</p>}, number={4 October}, journal={Water SA}, author={Mohamed E Abuarab and Salma M Hafez and Mohamed M Shahein and Ahmed M Hassan and Mohamed BI El-Sawy and Mohamed M El-Mogy and Emad A Abdeldaym}, year={2020}, month={Oct.} }