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M. Ayub, A. Tanveer, Z. Iqbal, M.S. Sharar and M. Azam, 1998. Response of Two Sunflower (Helianthus annuus L.) Cultivars To Different Levels of Nitrogen. Pakistan Journal of Biological Sciences, 1: 348-350.
DOI: 10.3923/pjbs.1998.348.350
URL: https://scialert.net/abstract/?doi=pjbs.1998.348.350
DOI: 10.3923/pjbs.1998.348.350
URL: https://scialert.net/abstract/?doi=pjbs.1998.348.350