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Article History

Received: 16 November 2018

Accepted: 25 February 2019

First Online: 18 April 2019

Ethics approval and consent to participate

: The study was conducted after getting approval from Arba minch University institutional research Directorate office and peer reviewed in the department. Written permission was obtained from Agricultural office and administrative leaders of respective districts. The verbal (non-written) consent was obtained. To maintain confidentiality, each and every one collected data were coded and locked in a separate paper bag to submit sample to laboratory to analysis. Following data entry into the computer all data were protected by password.

: Not applicable.

: The authors declare that they have no competing interests.

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