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	Provedor de dados Thai Agricultural (1) Chilean J. Agric. Res. (1) Colegio de Postgraduados (1) Scientia Agricola (1) Autor . Steidle Neto,Antonio J (1) Anastácio,Enrique A (1) Cruz Durán, Jairo Aarón, de la (1) Gomes,Francisco Sérgio (1) Grossi,José A.S (1) Jiranutch Nittayathareekul (1) Lopes,Daniela C (1) Oliveira,Luiz Felipe Ramalho de (1) Oliveira,Marcio Leles Romarco de (1) Santana,Reynaldo Campos (1) Sugunya Wongpornchai (1) Supreeda Homklin (1) Mais... Palavra-chave Spectrometer (4) 2AP (1) Critical level of reflectance (1) Cut flowers (1) Cámara digital (1) Digital camera (1) Escáner (1) Espectrómetro (1) Firmas espectrales (1) GC x GC-TOFMS technique (1) KDML 105 (1) Leaf nitrogen concentration (1) Leaf reflectance (1) NDVI (1) Nitrogen (1) Nitrógeno (1) Nivel crítico de reflectancia (1) Non-destructive analyses (1) Reflectance (1) Reflectancia (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Journal article (1) PhysicalObject (1) Tesis (1) Ano 2017 (1) 2012 (1) 2009 (1) 2008 (1) País Brazil (1) Chile (1) Mexico (1) Thailand (1) Idioma Inglês (2) Espanhol (1) Thailandês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Reflectancia e índices espectrales en pimiento para el diagnóstico nutrimental de nitrógeno Colegio de Postgraduados Cruz Durán, Jairo Aarón, de la. El conocimiento de las firmas espectrales en la valoración de parámetros fisiológicos y nutrimentales, serán de gran utilidad en una agricultura mayormente competitiva. El objetivo de esta investigación consistió en obtener firmas espectrales en hojas de pimiento mediante un espectrómetro e imágenes digitales (escáner) durante el desarrollo del cultivo, para el diagnóstico de estrés por carencias y excesos de nitrógeno. Se determinó la reflectancia de las hojas de pimiento en tres bandas del espectro visible (RGB) y dos del infrarrojo cercano (NR), se obtuvieron imágenes de plantas para la determinación del índice de área foliar (IAF) y se colectaron muestras foliares para el análisis de nitrógeno, el cual se determinó por el método de microkjeldahl. La... Tipo: Tesis Palavras-chave: Sensores remotos; Reflectancia; NDVI; Nitrógeno; Espectrómetro; Escáner; Cámara digital; Firmas espectrales; Nivel crítico de reflectancia; Remote sensors; Reflectance; Nitrogen; NDVI; Nitrogen; Spectrometer; Scanner; Digital camera; Spectral signatures; Critical level of reflectance. Ano: 2008 URL: http://hdl.handle.net/10521/1659 Estimating foliar nitrogen in Eucalyptus using vegetation indexes Scientia Agricola Oliveira,Luiz Felipe Ramalho de; Oliveira,Marcio Leles Romarco de; Gomes,Francisco Sérgio; Santana,Reynaldo Campos. ABSTRACT Nitrogen (N) has commonly been applied in Eucalyptus stands in Brazil and it has a direct relation with biomass production and chlorophyll content. Foliar N concentrations are used to diagnose soil and plant fertility levels and to develop N fertilizer application rates. Normally, foliar N is obtained using destructive methods, but indirect analyses using Vegetation Indexes (VIs) may be possible. The aim of this work was to evaluate VIs to estimate foliar N concentration in three Eucalyptus clones. Lower crown leaves of three clonal Eucalyptus plantations (25 months old) were classified into five color patterns using the Munsell Plant Tissue Color Chart. For each color, N concentration was determined by the Kjeldahl method and foliar reflectance... Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf nitrogen concentration; Non-destructive analyses; Spectrometer; Spectral reflectance; Leaf reflectance. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000200142 การวิเคราะห์องค์ประกอบที่ระเหยได้ในเมล็ดข้าวพันธุ์ขาวดอกมะลิ 105 (KDML 105) GC x GC-TOFMS Thai Agricultural Supreeda Homklin; Jiranutch Nittayathareekul; Sugunya Wongpornchai. Khao Dawk Mali 105 (KDML 105) (Oryza sativa L) is well known as Thai jasmine rice. The major aroma component of KDML 105 is 2-Acetyl-1-pyrroline (2AP). Besides the 2AP, KDML 105 contains various volatile components which contribute aroma and flavor to the rice. Moreover, hydrocarbons, aldehydes, ketones, and alcohols are also found in the rice sample. Due to the complex nature of the sample, some volatile components which co-elute with rice matrix components are not easily identified using traditional GC-MS. GCxGC-TOFMS is a new technique that increases peak capacity and enhances peak sensitivity. The research described here used GCxGC-TOFMS to identify components in the complex mixture of KDML 105 grain sample extracts. Two columns with different... Tipo: PhysicalObject Palavras-chave: Rice; 2AP; KDML 105; Volatile components; Spectrometer; GC x GC-TOFMS technique; ข้าวขาวดอกมะลิ 105; 2AP; เทคนิค GC x GC-TOFMS; สารระเหยในเมล็ด; เครื่องมือวัดเชิงแสง. Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5393 Potential of Spectral Reflectance as Postharvest Classification Tool for Flower Development of Calla Lily (Zantedeschia aethiopica (L.) Spreng.) Chilean J. Agric. Res. . Steidle Neto,Antonio J; Grossi,José A.S; Lopes,Daniela C; Anastácio,Enrique A. Unsuitable postharvest management is one of the most serious problems that floriculture has to face. An option for reducing postharvest losses is to use automatic systems for flower sorting and classification, which yield consistent results, reduce costs and speed up these tasks. The objective of this work was show the potential of spectral reflectance to distinguish different postharvest development stages of calla lily flowers, Zantedeschia aethiopica (L.) Spreng., aiming the use of this technology within automatic systems for flower classification. The measuring equipment was a spectrometer connected to a portable computer and configured for reflectance data acquisition in the 400 to 1000 nm range. Based on the results, it was verified a differentiation... Tipo: Journal article Palavras-chave: Cut flowers; Spectrometer. Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000400015 Registros recuperados: 4 Primeira ... 1 ... Última

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