Data/hora: 08/06/2024 12:43:03

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 04/09/1995
Data da última atualização: | 04/09/1995
Autoria: | EDWARDS, G. J.; BLAZQUEZ, C. H.; YOUNG, R. H.
Afiliação: | University of Florida, IFAS, Agricultural Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL 33850, USA.
Título: | Wavelength ratios selected from first derivatives of spectral reflectance curves of citrus trees under various levels of stress.
Ano de publicação: | 1981
Fonte/Imprenta: | Proc. Int. Soc. Citriculture, v.i, p.368-370, 1981
Idioma: | Inglês
Conteúdo: | Spectral reflectance curves of citrus trees were drawn from  telespectroradiometer  readings and their first derivative curves were plotted. Ratios were calculated from the original reflectance values at wavelengths selected because of peaks in the first derivative curves. The ratio for healthy citrus trees is higher than the ratio for blight-stressed trees. Telespectoradiometer reflectance curves of the same trees had lower ratios in February than in November. With this method, it was possible to distinguish stressed trees from healthy trees without visual inspection.
Palavras-Chave: | `Valencia' oranges; Telespectroradiometer; Wood zinc accumulation.
Thesaurus Nal: | water uptake.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (15992-1) - ADC - SP - -- - S10279 -  - S10279 - DIS