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	Provedor de dados 21 (1) Autor Berntsen, J. (1) Grant, R. (1) Kristensen, I.S. (1) Mølgaard, J.P. (1) Olesen, J.E. (1) Petersen, B.M. (1) Vinther, F.P. (1) Mais... Palavra-chave Air and water emissions (1) Farming Systems (1) Nutrient turnover (1) Pasture and forage crops (1) Soil biology (1) Soil quality (1) Mais... Tipo do documento Journal paper (1) Ano 2006 (1) País Germany (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Nitrate leaching from organic farming systems with rotational grass-clover and arable crops 21 Berntsen, J.; Grant, R.; Olesen, J.E.; Kristensen, I.S.; Vinther, F.P.; Mølgaard, J.P.; Petersen, B.M.. Organic farming is considered an effective mean of reducing nitrogen losses compared with more intensive conventional farming systems. However, under certain conditions organic farming may also be susceptible to high nitrogen (N) losses. This is especially the case for organic dairy farms on sandy soils that use grazed grass-clover in rotation with cereals, which may lead to high rates of nitrate leaching. A study was conducted on two commercial organic farms on sand and loamy sand soils. On each farm a three year old grass-clover field was selected. Half of the field was ploughed the first year and the other half was ploughed the next year. Spring barley (Hordeum vulgare L.) was sown after the spring ploughing. Measurements showed a low N leaching... Tipo: Journal paper Palavras-chave: Nutrient turnover; Pasture and forage crops; Farming Systems; Soil biology; Soil quality; Air and water emissions. Ano: 2006 URL: http://orgprints.org/4642/1/4642.doc Registros recuperados: 1 Primeira ... 1 ... Última

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