5 pages, We developed an Excel-based computational template Extension educators can use to assist clientele with scheduling irrigation for efficient use of water. With the template, the user applies the dual crop coefficient method to calculate evaporation and transpiration rates separately, with the result being more accurate soil water tracking as compared to what occurs when a single crop coefficient is used. Crop water needs can be conveniently calculated on the basis of soil characteristics, crop growth stages, and weather information. Application examples demonstrate that the amount and frequency of irrigation should be adjusted according to soil texture. The template and application examples are available to Extension professionals as electronic supplementary material.
9 pages., Via online journal., This paper looks at how knowledge has been communicated within a multi-layered water governance structure in order to manage non-point source (NPS) pollution in South Korea. Since 28,300 ha of wetlands were reclaimed in Saemangeum, on the western side of the country, in 2006, the artificial lake created has suffered from chronic pollution. For the purposes of integrated water management, a water governance structure was formed linking organisations ranging from local to national scales. Despite institutional efforts to implement integrated water management and a governance approach, knowledge of NPS pollution and its management was produced and communicated among certain stakeholders only, such as policy and technical experts. In-depth interview and archival analysis of this research attempt to explain why and how the loss of knowledge communication occurred in this context. The first result of this research illustrates that, while knowledge communication has been smooth at the national and provincial layers, it has not taken place efficiently through to the local layer. When it comes to local farmers and governmental organisations and experts in particular, knowledge nodes have not functioned. Second, the research suggests that non-communication of knowledge has been mobilised as a professional strategy. Actors at the local layer have prioritized their professional interests and intentionally avoided knowledge communication with other department or ministries. Local and community actors have chosen not to provide farmers information. We conclude by discussing policy implications for knowledge communication and inclusive water governance.
7pgs, Aerial images taken during the growing seasons of 2009, 2011, 2013, 2015, and 2017 were visually inspected for evidence of irrigation. Center pivot irrigation was identified by the characteristic shape of the spans and the curved tracks left by the wheels. The author manually delineated a polygon over each agricultural area where signs of irrigation infrastructure were observed. The result is a map of 2,689 polygons covering 146,662 acres in South Carolina. Compared with the United States Department of Agriculture 2017 Census of Agriculture, the sampling results account for over 69% of total irrigated area and over 98% of area irrigated solely by center pivots. Most center pivots covered from 25 to 75 acres, while the largest center pivot extended over 300 acres. These results are an important contribution to the quantification of water use in South Carolina.