**Hakan Kadioglu 1, Harlene Hatterman-Valenti 2, Xinhua Jia 3, Xuefeng Chu 4, Hakan Aslan <sup>5</sup> and Halis Simsek 2,\***


Received: 3 July 2019; Accepted: 17 August 2019; Published: 20 August 2019

**Abstract:** Lysimeter experiments were conducted under greenhouse conditions to investigate canola (*Brassica napus* L.) plant water use, growth, and yield parameters for three different water table depths of 30, 60, and 90 cm. Additionally, control experiments were conducted, and only irrigation was applied to these lysimeters without water table limitations. The canola plant's tolerance level to shallow groundwater was determined. Results showed that groundwater contributions to canola plant for the treatments at 30, 60, and 90 cm water table depths were 97%, 71%, and 68%, respectively, while the average grain yields of canola were 4.5, 5.3, and 6.3 gr, respectively. These results demonstrate that a 90 cm water table depth is the optimum depth for canola plants to produce a high yield with the least amount of water utilization.

**Keywords:** lysimeter; canola; water table; water use efficiency; root distribution; evapotranspiration
