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The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of CTA concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. The mention of specific companies or products of manufacturers, whether or not these have been patented, does not imply that these have been endorsed or recommended by CTA in preference to others of a similar nature that are not mentioned. The views expressed in this information product are those of the author(s) and do not necessarily reflect the views of CTA.

This document has been produced with the financial assistance of the European Union. The contents of this document are the sole responsibility of CTA and can under no circumstances be regarded as reflecting the position of the European Union.

© 2016, CTA. Technical Centre for Agricultural and Rural Cooperation

CTA is a joint institution operating under the framework of the Cotonou Agreement between the ACP Group of States (Africa, the Caribbean and the Pacific) and the EU Member States (European Union). CTA is funded by the European Union.