The AgScience blog is published on behalf of the New Zealand Institute of Agricultural and Horticultural Science (NZIAHS). The institute represents over 600 members covering all aspects of the primary sector including research and teaching in the Crown Research Institutes (CRIs), the universities and the private sector; primary industry companies involved with the meat, wool, dairy, fertiliser and horticulture sectors; extension and management specialists and students. Opinions expressed here are not necessarily the official position of of the institute.