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An in situ incubation technique to measure the contribution of organic N to potatoes IPB - Escola Superior Agrária
Rodrigues, M.A..
The quantification of sidedress N rate from in-season information on crop N nutritional status is extremely important in order to use only the necessary amount of nutrient to achieve maximum yields without significant N losses from soil. During three consecutive years (1996, 1997 and 1998) field N fertilizer experiments with irrigated potato (Solanum tuberosum L., cv. Désirée) were conducted in Bragança (NE Portugal). Eight preplant treatments (0, 50, 100, 200 and 300 kg urea-N/ha and poultry manure, farmyard manure and municipal solid waste in rates equivalent to 100 kg organic-N/ha) were arranged as main plots and five sidedress N rates (0, 25, 50, 100 and 200 kg urea-N/ha) included as subplots. Petiole nitrate concentration, determined by a laboratory...
Tipo: Article Palavras-chave: Solanum tuberosum; Crop N management; Decision support system; Plant analysis; Tissue testing.
Ano: 2004 URL: http://hdl.handle.net/10198/2202
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Quantitative sidedress nitrogen recommendations for potatoes based upon crop nutritional indices IPB - Escola Superior Agrária
Rodrigues, M.A.; Coutinho, João; Martins, F.; Arrobas, Margarida.
The quantification of sidedress N rate from in-season information on crop N nutritional status is extremely important in order to use only the necessary amount of nutrient to achieve maximum yields without significant N losses from soil. During three consecutive years (1996, 1997 and 1998) field N fertilizer experiments with irrigated potato (Solanum tuberosum L., cv. Désirée) were conducted in Bragança (NE Portugal). Eight preplant treatments (0, 50, 100, 200 and 300 kg urea-N/ha and poultry manure, farmyard manure and municipal solid waste in rates equivalent to 100 kg organic-N/ha) were arranged as main plots and five sidedress N rates (0, 25, 50, 100 and 200 kg urea-N/ha) included as subplots. Petiole nitrate concentration, determined by a laboratory...
Tipo: Article Palavras-chave: Solanum tuberosum; Crop N management; Decision support system; Plant analysis; Tissue testing.
Ano: 2005 URL: http://hdl.handle.net/10198/2201
Registros recuperados: 2
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