11 pages, via Online journal, The Soil Vulnerability Index (SVI) was developed by the USDA Natural Resources Conservation Service (NRCS) to identify inherent vulnerability of cropland to runoff and leaching. It is a simple index that relies on the SSURGO database and can be used with basic knowledge of ArcGIS. The goal of this study was to investigate a relationship between constituent (sediment and nutrient) loadings and fraction of the watershed in each SVI class. The SVI maps were developed for each of the seven subwatersheds of the Mark Twain Lake watershed in Missouri, which were similar in soil conditions and climatic variability. The SVI assessment was performed by investigating if the distribution of the SVI for cropland in each subwatershed could help explain measured 2006 to 2010 sediment and nutrient loads better than crop distribution alone. Regression analyses were performed between annual loads of sediment and nutrients exported from the watersheds and a composite number that included either cropland distribution alone, or cropland distribution combined with the SVI. Coefficients of determination and p-values were compared to assess the ability of land use and SVI distributions to explain stream loads. Integrating the SVI in the land cover variable improved the ability to explain constituent loads in the watersheds for sediment, total nutrients, and dissolved nitrogen (N). Regression results with and without the SVI were identical for dissolved phosphorus (P), potentially indicating that SVI was not indicative of dissolved P transport at the current site. Overall, the application of the SVI at watershed scale was not perfect, but acceptable at correctly identifying cropland of greatest vulnerability and linking with transported constituent loads.
Posted at: http://www.usatoday.com/news/education/2005-07-21-students-farmers_x.htm, Describes student-run farms that have cropped up at almost 60 schools in 27 states in the last decade or so, as well as programs under which local farmers provide food to area universities.
Via Food Safety Network. 2 pages., Reports on a contentious roundtable discussion. "Instead of seeking consensus, all too often polemics are dominating."
10 pages, This study was carried out to reveal the sources of communication and social network of organic and conventional hazelnut producers in Samsun province. The primary and basic material of the study is the data obtained from the surveys, interviews and observations of the organic and conventional hazelnut producers in Çamlıca, Yüksekyayla villages and Ağcagüney town. Both producer groups were compared in terms of their social networks and communication channels especially on the use of different fertilizers by making suggestions on how to develop it. The results of the research showed that socio-economic status of the organic hazelnut producers was better than conventional producers in terms of land size, income, cooperation capacity, risk management and agricultural supports. Social Network Analysis (SNA) has shown the graphs of communication networks among the producers, their relationships with different public, private and mass media information sources and especially revealed leader farmers whom functioned as source of information transfer (or even blocker) among them. The relationships in organic hazelnut producers’ communication network in the village are strong, dense and information sources are varied. On the contrary, the relationships in communication network of conventional hazelnut producers were looser, strong and information sources were uniform. The main source of technical information for both groups of producers was the experienced leader farmers; as for organic producers, the heads of the local organic producers' union was the main information source in terms of commercial, legal and organizational aspects. In other words, both organic and conventional producers rely on knowledge and experience of producers who take on the role of opinion leader within the village. Therefore, innovation and knowledge transfer to farmers can be delivered through these opinion leaders. As a result of the research, it can be said that institutional information sources do not adequately support organic and conventional hazelnut growers. Thus, organic producers developed their local knowledge source based on their on-farm trials and experiences and shared this knowledge within their peer groups. However, this information needs to be supported with scientific findings.
Risius, Antje (author), Hamm, Ulrich (author), and University of Kassel, Faculty of Organic Agriculture, Food and Agricultural Marketing, Steinstr.19, Witzenhausen, Germany
Format:
Journal article
Publication Date:
2017-02
Published:
Germany: Elsevier Ltd.
Location:
Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 162 Document Number: D08138
Online journal. 2 pages., Author comments on meanings of these terms: sustainable agriculture, factory farm, family farm, local food, and organic and natural.
