JK Cements, a State-owned undertaking, has witnessed vertical fall in the production and revenue realisation for the first quarter of this fiscal compared to corresponding period last year.Sources told a newspaper that during the first quarter (April 1 to June 30) of the 2011-12 fiscal, production of clinker (semi-finished cement which is turned into final product) from the plant was 43,000 metric tonne. However the figures have dipped to 22,000 metric tonne during first three months of the fiscal 2012-13.Likewise, sources said, the sale of the cement during first quarter of last year was 39,000 metric tonne, but it has come down to 29,000 metric tonne for the corresponding period this year.Sources said the situation has resulted in a sharp dip in revenue realisation too which is a concern. The sources said that the revenue realised for first quarter of this year has been Rs 20 crore while as the returns were Rs 26 crore for the first quarter of 2011-12.