1993
DOI: 10.1016/0304-4238(93)90080-a
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Nitrogen drawdown index as a predictor of nitrogen requirements for Nephrolepis in sawdust media

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Cited by 13 publications
(16 citation statements)
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“…The proportion of the applied N remaining after four days incubation is then calculated (1). Saturating solutions containing either 75 or 150 mg/L N present as NO3-can be used (1,2,10), and the NDI is referred to as either NDI75 or NDIiso where the subscript denotes the concentration of N in the saturating solution (5,10). Regular and premium grade potting media must have an NDl75>0.2 or >0.7, respectively for conformity to the Australian Standard (1).…”
Section: Introductionmentioning
confidence: 99%
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“…The proportion of the applied N remaining after four days incubation is then calculated (1). Saturating solutions containing either 75 or 150 mg/L N present as NO3-can be used (1,2,10), and the NDI is referred to as either NDI75 or NDIiso where the subscript denotes the concentration of N in the saturating solution (5,10). Regular and premium grade potting media must have an NDl75>0.2 or >0.7, respectively for conformity to the Australian Standard (1).…”
Section: Introductionmentioning
confidence: 99%
“…Increasing temperature over the range 20 to 50°C is generally reported to encourage microbial activity and accelerate cellulose ' decomposition (5,7). NDI has recently been used to determine quality criteria for potting media (1) and to predict N requirements of container plants grown in media containing woodwastes (9,10). It is essential to determine whether incubation temperature and pH influence test results in order to ensure accurate assessment of media and interpretation of results underproduction conditions.…”
Section: Introductionmentioning
confidence: 99%
“…Muchos trabajos Selmer-Olsen et al, 1983;Solbraa, 1986;Bunt, 1988;Handreck 1992a, b;Sharman y Whitehouse, 1993) refieren cómo estos materiales sustitutivos de la turba, presentan problemas por su gran capacidad de inmovilización de Nitrógeno, debido al alto contenido en carbono fácilmente disponible para los microorganismos.…”
Section: Iv1-introducciónunclassified
“…Aunque es conocido que el proceso de compostaje reduce la tasa de inmovilización al consumirse durante el mismo buena parte del citado carbono (celulosa y hemicelulosa), algunos autores indican que no elimina absolutamente el fenómeno (Yates y Rogers, 1981;Gutser et al, 1983;Teicher et al, 1983;Handreck, 1992b;Sharman y Whitehouse, 1993), lo que hace pensar que intervienen otros factores además del señalado.…”
Section: Iv1-introducciónunclassified
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