Received: 19 September 2018
Accepted: 28 January 2019
First Online: 8 February 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest on the content of manuscript and study undertaken.
: a clear expression of consent was obtained from the farmers/ informants who participated in discussion and provided feedback on elaborating the purpose of research study; they provided information on undertaking data on knowledge resource.