Manuring cotton, especially with nitrogenous fertilisers, has been established to increase yields appreciably (Panse and Khana, 1953; Neelakantan, Kamalanathan and Krishnamurthy, 1950; Kanniyan and Krishnamurthy, 1964; Srinivasa Iyengar and Kottur, 1964) and 45 kg nitrogen per hectare is the recommeded dose for irrigated Cambodia cotton in Madras State (Kamalanathan and Nagarajan, 1961). But Ramachandran et al (1964) have recommended 67.5 kg N per hectare for irrigated Winter Cambodia cotton. With increasing demand for and consequent shortage of ammonium sulphate, it became necessary to switch over to other nitrogenous fertilisers. With this end in view, an experiment was laid out at Coimbatore to test the efficacy of various nitrogenous fertilisers and the results are presented.
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Tamil Nadu, India.
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