Prescient diagnostic analysis: A proposed new approach to evaluating plant nutrient diagnostic methods

Beverly, R. B.; Hallmark, W. B.

doi:10.1080/00103629209368761

Cited by 21 publications

(41 citation statements)

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“…Este procedimento, na obtenção de normas DRIS sem transformação logarítmica, indicou que as normas geradas por essa metodologia foram estatisticamente semelhantes às obtidas por Pinto (2002), para a maioria das relações nutricionais (Wadt et al, 2007). As médias e variâncias das relações bivariadas transformadas logaritmicamente e das relações multivariadas também foram obtidas do conjunto de dados de monitoramento, conforme Beverly & Hallmark (1992) e Parent & Dafir (1992), respectivamente. A exceção foi que, nas relações bivariadas, a variância foi calculada para cada relação, e não somente para a concentração do nutriente, conforme proposto originalmente por Beverly & Hallmark (1992).…”

Section: Methodsunclassified

“…As médias e variâncias das relações bivariadas transformadas logaritmicamente e das relações multivariadas também foram obtidas do conjunto de dados de monitoramento, conforme Beverly & Hallmark (1992) e Parent & Dafir (1992), respectivamente. A exceção foi que, nas relações bivariadas, a variância foi calculada para cada relação, e não somente para a concentração do nutriente, conforme proposto originalmente por Beverly & Hallmark (1992).…”

Section: Methodsunclassified

“…A utilidade de metodologias de avaliação do estado nutricional das plantas depende da capacidade em identificar corretamente qual nutriente limita a produtividade das culturas, de modo a possibilitar a correção de desequilíbrios nutricionais, pela correção no manejo da adubação (Beverly & Hallmark, 1992).…”

Section: Introductionunclassified

“…O primeiro método proposto para avaliar metodicamente a utilidade de sistemas de diagnóstico do estado nutricional foi o sistema "prescient diagnostic analysis methodogy" (Beverly & Hallmark, 1992). Mais recentemente, com base no trabalho desses autores, Wadt & Lemos (2010) propuseram sete medidas de acurácia para tornar essa avaliação compatível com a utilização do critério do potencial de resposta à adubação (PRA), proposto por Wadt (2005), em que a acurácia foi definida como a medida da proximidade entre o valor obtido em um diagnóstico nutricional e o verdadeiro estado nutricional da planta.…”

Section: Introductionunclassified

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Acurácia do diagnóstico nutricional de pomares de mangueiras obtido por três fórmulas DRIS

Wadt

Silva

2010

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi testar a aplicação de medidas de acurácia para determinar a utilidade de diagnósticos nutricionais para comparação de fórmulas DRIS, e avaliar o emprego dessas medidas no processo de modelagem das funções do Sistema Integrado de Diagnose e Recomendação (DRIS). Foram avaliadas três fórmulas: relações bivariadas simplificadas; relações multivariadas; e modelagem das funções DRIS. Foram utilizados dados de monitoramento nutricional de pomares de mangueiras cultivadas no Vale do São Francisco. O desempenho das fórmulas foi avaliado com base na concordância de seus diagnósticos com o proporcionado pelo método das faixas de suficiência. Foram determinadas as acurácias global e de insuficiência, de equilíbrio, de excesso, de deficiência, de suficiência e de toxicidade nutricional. A fórmula simplificada e a de relações multivariadas tiveram resultados semelhantes para as acurácias de deficiência e insuficiência, mas inferior ao da fórmula DRIS para modelagem das funções. Esta última, por possibilitar o ajuste do coeficiente de sensibilidade de cada função DRIS, mostrou-se promissora para diminuir riscos de diagnósticos falsos de deficiência (deixar de recomendar o nutriente quando ele é necessário) e de insuficiência (recomendar o nutriente quando ele não é necessário). No entanto, a fórmula DRIS para modelagem das funções não mostra desempenho satisfatório nas demais medidas de acurácia.Termos para indexação: Mangifera indica, faixas de suficiência, diagnose foliar, potencial de resposta. Nutritional diagnosis accuracy of mango tree orchards through three DRIS formulasAbstract -The objective of this work was to test the application of accuracy measures to determine the usefulness of nutritional diagnosis to compare different DRIS formulas, and to evaluate the use of these measures in the DRIS function modeling process. Three DRIS formulas were evaluated: bivariate relations (simplified); multivariate relations; and DRIS function modeling. Monitoring data from commercial mango orchards grown at São Francisco River Valley, Brazil, were used. Formula performances were evaluated based on the agreement of their diagnoses with the one provided by the sufficiency range method. Global accuracy, and the ones for insufficiency, equilibrium, excess, deficiency, sufficiency and nutritional toxicity were determined. The simplified and multivariate formulas showed similar results for insufficiency and deficiency accuracies, but they had a lower performance than the DRIS function modeling formula. This latter, for allowing of the adjustment of each DRIS function sensibility coefficient, showed to be promising in reducing the risks of false diagnosis for deficiency (as for not recommend the nutrient when it is necessary) and for insufficiency (as for recommend the nutrient when it is not necessary). However, the DRIS formula for function modeling does not show a satisfactory performance for other accuracy measures.Index terms: Mangifera indica, sufficiency ranges, foliar diagnosis, response poten...

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Section: Methodsunclassified

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Acurácia do diagnóstico nutricional de pomares de mangueiras obtido por três fórmulas DRIS

Wadt

Silva

2010

Pesq. agropec. bras.

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“…Experiments performed in both growing season, half of the plot was fertilized with N and the other half did not receive the N fertilizer. This was based on the study of true/false diagnosis describe by Beverly and Hallmark (1992).…”

Section: Introductionmentioning

confidence: 99%

Top-dressing nitrogen management decision in potato using the UFV-80 color chart and SPAD readings

Braun¹,

Silva²,

Fontes³

et al. 2015

Afr. J. Agric. Res.

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The chlorophyll meter (SPAD-502) and "UFV-80" color chart can be used to diagnose the nitrogen (N) nutritional status of potato plants to determine the need for fertilizer-N topdressing. The present investigation was focused on how chlorophyll meter and "UFV-80" color chart help in determining optimal N management through real time N application for improving yield and profitable rate in potato crop. The experiments, in two planting seasons (dry and wet), were carried out a split-plot design in a randomized complete blocks with four repetitions. In the whole plot, five N fertilization rates (0, 50, 100, 200 and 300 kg ha -1 of N) were applied before planting. In the half of plot area, N fertilization rates (42, 152, 152, 152 and 152 kg ha -1 of N at dry season and 133, 93, 69, 58 and 205 kg ha -1 of N in wet season) were or did not applied in top-dressing, depending on the UFV-80 color chart reading and SPAD chlorophyll meter reading in the terminal leaflet of the fourth leaf, at 21 day after the plant emergency (DAE). At 77 and 70 DAE for the dry and wet seasons, respectively, the plants were harvested to determine the commercial tuber yield. The SPAD chlorophyll meter reading and "UFV-80" color chart can be used to determine N nutritional status in potato crops in both planting seasons. Both planting seasons, the commercial production was not influenced by the N fertilization rates in pre-planting and top-dressing.

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Applicability of DRIS in bananas based on the accuracy of nutritional diagnoses for nitrogen and potassium

Villaseñor-Ortiz

Prado

Silva

et al. 2022

Sci Rep

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DRIS (Diagnosis Recommendation Integrated System) is a tool used in the interpretation of leaf analyses that values the balance of nutrients, an important fact for a better assessment of the nutritional status of banana plants. Its usefulness depends on the ability to identify the nutrients that limit productivity in order to correct possible nutritional imbalances, but there is a lack of research in all crops, including bananas, to assess the accuracy of these diagnoses, which have a worrying global implication. To this end, this study evaluates DRIS norms for banana cultivation in Ecuador and the use of accuracy measurements for nutritional diagnosis, verifying the capacity of DRIS to detect true nutritional status based on plant response. The database created here contains 233 results referring to productivity and leaf contents of N, P, K, Ca, Mg, S, Cl, Fe, Mn, Cu, B, and Zn for banana trees in 2018, 2019, and 2020. Then, a field experiment evaluated doses of nitrogen and potassium and the accuracy of DRIS norms for N and K. The results show that the DRIS of banana produced in Ecuador depends on the nutrient being variable according to the crop nutritional status. The DRIS norms for diagnosis of N and K result in an acceptable accuracy to identify only deficiencies and toxicities, respectively, indicating the need for adjustments in these standards for later use in the field. Thus, there is a need for more research aiming to adopt calibrated DRIS diagnostic norms to assess the nutritional status of bananas in Ecuador.

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Prescient diagnostic analysis: A proposed new approach to evaluating plant nutrient diagnostic methods

Cited by 21 publications

References 3 publications

Acurácia do diagnóstico nutricional de pomares de mangueiras obtido por três fórmulas DRIS

Acurácia do diagnóstico nutricional de pomares de mangueiras obtido por três fórmulas DRIS

Top-dressing nitrogen management decision in potato using the UFV-80 color chart and SPAD readings

Applicability of DRIS in bananas based on the accuracy of nutritional diagnoses for nitrogen and potassium

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