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| | Campillo, Ricardo, Jobet, Claudio and Undurraga, Pablo Effects of Nitrogen on Productivity, Grain Quality, and Optimal Nitrogen Rates in Winter Wheat cv. Kumpa-INIA in Andisols of Southern Chile. Chilean J. Agric. Res., Mar 2010, vol.70, no.1, p.122-131. ISSN 0718-5839
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