6 pages., via online journal., Sustainable agriculture is spreading in Japan in response to growing concerns about the environmental burden of the agriculture sector, but less than 1% of the total crop area for each vegetable in Japan is grown sustainably. Environmentally friendly agricultural products are produced by using organic and low-input farming techniques; low-input farming aims to reduce chemical inputs, such as fertilizers, pesticides, and herbicides, by half. Here, we used komatsuna (Japanese mustard spinach, Brassica rapa var. perviridis) as a model vegetable to study the environmental impact of low-input farming and ways to promote the purchase of organically and low-input farmed vegetables. We first assessed greenhouse gas emissions resulting from organic, low-input, and conventional farming of komatsuna. We also evaluated the effectiveness of providing consumers with detailed farm management and seasonality information to market organically and low-input farmed vegetables. We estimated marginal willingness-to-pay (MWTP) using choice-based conjoint analysis, based on attributes of price, fertilizer use, pesticide use, and region of origin. For seasonality, the questionnaire incorporating these attributes was conducted twice: once assuming purchasing in season, the other out of season. The greenhouse gas emissions of organic farming per area (196.7 kg CO2-eq/10 a/year) and per yield (72.3 kg CO2-eq/t/year) were less than those of low-input (322.6 kg CO2-eq/10 a/year, 120.7 kg CO2-eq/t/year) and conventional (594.0 kg CO2-eq/10 a/year, 220.7 kg CO2-eq/t/year) farming. MWTPs were highest for pesticide-free komatsuna (76.9 yen out of season, 66.2 yen in season), followed by full organic fertilizer (66.0 yen out of season, 63.4 yen in season), half organic fertilizer (35.8 yen out of season, 19.8 yen in season), and half pesticide (29.2 yen out of season, 21.0 yen in season). Consumers showed greater preference for organically and low-input farmed komatsuna out of season than in season. Consumers were more interested in pesticide information than in fertilizer and region of origin information. Our findings suggest that providing detailed cultivation and seasonality information would be a beneficial consumer communication tool to increase the market for sustainable agricultural products.
8 pages., via online journal., Social media bring various stakeholders of the agro-food system together into a new playing field. This article reveals the dynamics of this playing field and the ways in which this can influence the governance of agro-food sustainability. We delineate three pathways that highlight the ways in which social media can have implications for the governance of agro-food sustainability; firstly, Hypes on agro-food sustainability issues, secondly, opportunities for the self-organization of food movements, and thirdly, data for new forms of agro-food governance. We conclude that while mass self-communication on social media forms an emergent force that disrupts agro-food governance, it also generates data that forms a resource for powerful players to regain control.
