“…Vietnam); in Iran, regulated surface water charges are limited to 1-3% of the gross value of crop output (Keshavarz et al, 2005); in Cyprus, the charge is limited to no more than 40% of the weighted average unit cost (65% in exceptional cases) (Tsiourtis, 2002); in India, a 1972 policy review recommended that water rates should lie within the range of 5-12% of gross farm revenue (Prasad and Rao, 1991;Vaidyanathan, 1992). Elsewhere, minimum values are sometimes (ineffectively) decreed as in Korea (Sarker and Itoh, 2001) and Peru (Vos, 2002).…”