1979
DOI: 10.2307/2402524
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A Bioassay for Comparing Phosphorus Availability in Soils

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Cited by 100 publications
(54 citation statements)
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“…A bioassay has been developed which integrates plant demand for phosphorus (P) with P availability in soil (Harrison & Helliwell, 1979), and its potential use as a diagnostic tool in the assessment of P deficiency in forest trees has been demonstrated (Dighton & Harrison, 1983;Harrison et al, 1986a). The bioassay is based on a negative exponential relationship between ^^P-labelled phosphorus uptake by plant roots from a test solution in the laboratory and the amount of P in the growing medium previously available to the trees.…”
Section: Introductionmentioning
confidence: 99%
“…A bioassay has been developed which integrates plant demand for phosphorus (P) with P availability in soil (Harrison & Helliwell, 1979), and its potential use as a diagnostic tool in the assessment of P deficiency in forest trees has been demonstrated (Dighton & Harrison, 1983;Harrison et al, 1986a). The bioassay is based on a negative exponential relationship between ^^P-labelled phosphorus uptake by plant roots from a test solution in the laboratory and the amount of P in the growing medium previously available to the trees.…”
Section: Introductionmentioning
confidence: 99%
“…We used a screening design (see Mason et al 1989), adapted for a law-ofthe-minimum type of resource limitation (cf, Tilman 1992, Rastetter andShaver 1992). The response of seedlinzs to generous additions of all essential resources but one can provide a "bioassay" of the power of a substrate to supply that resource to plants (Harrison and Helliwell 1979;Van Cleve and Harrison 1985). To speed the screening process we grouped some treatments and manipulated all known essential resources in a single design.…”
Section: Studv Sitesmentioning
confidence: 99%
“…Os resultados originais (nM P.g -1 .h -1 ) foram transformados a log(10), segundo recomendações de HARRISON & HELLIWELL (1979) e obteve-se uma regressão negativa com a concentração de P na solução nutritiva. As raízes das plantas deficientes em P (0,0mM P) mostraram uma absorção do 32 P 6,5 vezes maior que das plantas não deficientes (2,0 mM P).…”
Section: Cultura Do Feijoeiro -Diagnose Foliarunclassified
“…Os resultados obtidos concordam com os obtidos por BOWEN (1970) e HARRISON & HELLIWELL (1979), mostram o potencial do método dos traçadores para detectar deficiências nutricionais.…”
Section: Cultura Do Feijoeiro -Diagnose Foliarunclassified
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