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Open AccessArticle

Lysimeter-Based Water Use and Crop Coefficient of Drip-Irrigated Potato in an Arid Environment

1
Prince Sultan Bin Abdulaziz International Prize for Water Chair, Prince Sultan Institute for Environmental, Water and Desert Research, King Saud University, Riyadh 11451, Saudi Arabia
2
Department of Agricultural Engineering, King Saud University, Riyadh 11451, Saudi Arabia
*
Author to whom correspondence should be addressed.
Agronomy 2019, 9(11), 756; https://doi.org/10.3390/agronomy9110756
Received: 3 August 2019 / Revised: 24 October 2019 / Accepted: 8 November 2019 / Published: 14 November 2019
(This article belongs to the Special Issue Increasing Agricultural Water Productivity in a Changing Environment)
The determination of the water requirements and crop coefficient (Kc) of agricultural crops helps to create an appropriate irrigation schedule, and with the effective management of irrigation water. The aim of this research was to estimate the water requirement, Kc, and water-use efficiency (WUE) of potato using non-weighing-type lysimeters in four regions of the Kingdom of Saudi Arabia (Qassiem, Riyadh, Al-Jouf, and Eastern). Our results clearly show that the accumulated values of the measured crop evapotranspiration of potato derived from the lysimeters were 573, 554, 592, and 570 mm, while the accumulated values of the predicted crop evapotranspiration from Penman-Monteith equation based on FAO (Food and Agriculture Organization) were 651, 632, 672, and 647 mm for the Qassiem, Riyadh, Al-Jouf, and Eastern regions, respectively. The Kc values of potato obtained from the lysimeters were Kc initial (0.58, 0.54, 0.50, and 0.52), Kc middle (1.02, 1.05, 1.13, and 1.10), and Kc end (0.73, 0.74, 0.74, and 0.75) for the Qassiem, Riyadh, Al-Jouf, and Eastern regions, respectively. Based on the amount of water used and the yield achieved, the highest WUE (3.6 kg m−3) was observed in the Riyadh region, while the lowest WUE (1.5 kg m−3) was observed in the Al-Jouf region. View Full-Text
Keywords: crop coefficient; crop evapotranspiration; lysimeter; reference evapotranspiration; water use efficiency crop coefficient; crop evapotranspiration; lysimeter; reference evapotranspiration; water use efficiency
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MDPI and ACS Style

Alataway, A.; Al-Ghobari, H.; Mohammad, F.; Dewidar, A. Lysimeter-Based Water Use and Crop Coefficient of Drip-Irrigated Potato in an Arid Environment. Agronomy 2019, 9, 756.

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