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                           equation.” Proc. National Irrigation Symposium, ASAE, Phoenix, AZ, pp. 209-215.Walter,
                           I. A., Allen, R. G., Elliott, R., Mecham, B., Jensen, M. E., Itenfisu, D., Howell,
                           T. A., Snyder, R., Brown, P., Echings, S., Spofford, T., Hattendorf, M., Cuenca, R.
                           H., Wright, J. L. and Martin, D. (2000). “ASCE standardized reference evapotranspiration
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