It had posted net profit of Rs 56.87 crore in the January -March quarter of 2011-12 fiscal, the company said in a filing to the BSE.
Total income of the company in Q4 fell to Rs 1,149.71 crore in, from Rs 2,088 crore in the year-ago period.
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For the 2012-13 fiscal, it posted net loss of Rs 170.73 crore, as against net profit of Rs 126.73 crore in 2011-12.
Total income of the company in the last fiscal decreased to Rs 6,725.01 crore from Rs 7,309.93 crore year go.
The performance of the company took a beating because some of the units remained closed during the quarter for hooking up and commissioning for project of conversion of gas-based feedstock, it said.
National Fertilizers has two manufacturing plants in Punjab and one each in Madhya Pradesh and Haryana.
The company scrip fell 4.53% to close at Rs 44.25 on the BSE.
