IRSA had declared a water shortage of 35 to 40 percent in the coming Rabbi season. That means our wheat crop will be hit this year. It is yet to be calculated what effect in net it would have on wheat production but a loss is definite. Punjab can offset shortage of water by tube-well operation, which by the way, would further deplete the ground water resources with added cost of diesel. Sindh would be the worst sufferer. Sindh has 14.7 percent wheat production of Pakistan while it has only 9.6 percent share of tube-wells in the country. This should be an eye-opener for Sindh as to how would it meet the water shortage with a gap of 5.1 percent in number of tube-wells? Obviously Sindh would not be able to produce its share of wheat. Will that not be a statement enough about the need to have a water-storage reservoir like the Kalabagh dam? -DR M. YAQOOB BHATTI, Lahore, September 13.