7 pages., via online journal, There are approximately 65 dairy farms in Mississippi (Gregory, 2019) with an estimated annual milk value of $26 million (Mississippi Farm Bureau, n.d.). Mastitis is the most expensive disease in the dairy industry (Neeser, Hueston, Godden, & Bey, 2006) and can decrease milk production by 1,181 kg per lactation in multiparous cows (Wilson et al., 2004). Clinical mastitis accounts for the largest use of antibiotics in livestock species (Thomson, Rantala, Hautala, Pyörälä, & Kaartinen, 2008), a circumstance that raises concerns of antimicrobial resistance (Pol & Ruegg, 2007; Wang et al., 2015) and increases producer expenses due to purchasing antibiotics and discarding milk during treatment (Rollin, Dhuyvetter, & Overton, 2015). On-farm bacteriological culturing (OFBC) enables producers to distinguish among broad categories of microorganisms with great accuracy and provides results within 24 hr, versus approximately a week when cultures are sent to a laboratory (Down, Bradley, Breen, & Green, 2017). Despite the availability of several viable OFBC systems, adoption of OFBC in Mississippi has been limited.
The purpose of the study reported here was to implement and evaluate an OFBC pilot test with a small sample of Mississippi dairy producers. The objectives of the study were
to identify reasons for producers' lack of OFBC adoption,
to explore change in producers' knowledge and perceptions of OFBC before and after trial, and
to assess the effectiveness of an Extension-led trialing program relative to OFBC adoption.
This study empirically examined the effects of the participatory approach on the adoption of new crop varieties and agricultural practices. Particularly, we focused on the social network structure and examined how the introduced technologies diffused through networks in rural Ethiopia. Our empirical results indicate that if farmers knew and trusted fellow participants, the probability of adopting a new variety increased by 25 percentage points. However, this network had no statistical impact on the diffusion of new agricultural practices. We conclude that the participatory approach has great potential in the adoption of new crop varieties through the social networks of farmers in Ethiopia.
