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Eileen M. Perry, Ian Goodwin and David Cornwall

is based on reflectance in the red region, dominated by absorption of light (related to chlorophyll pigments) and in the NIR, dominated by reflectance of the mesophyll tissue. NDRE (as well as chlorophyll indices such as CI) measure subtle changes in

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Juan Carlos Díaz-Pérez, Jesús Bautista, Gunawati Gunawan, Anthony Bateman and Cliff Martin Riner

of this study and are reported in a companion article ( Díaz-Pérez et al., 2018 ). Leaf chlorophyll index. Chlorophyll indices were determined weekly over the season on six well-exposed and healthy leaves per plot using a chlorophyll meter

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Juan Carlos Díaz-Pérez

index. Chlorophyll indices decreased with increased shading levels ( Fig. 5 ) and were not correlated with leaf N concentration. Chlorophyll indices were highest ( P < 0.0001) in ‘Camelot’ (mean = 60.7) followed by ‘Lafayette’ (mean = 59.8) and

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Juan Carlos Díaz-Pérez and Touria E. Eaton

+ stem) DW of individual plants were determined. Leaf CI. Chlorophyll indices were determined twice a week over the season on six mature, well-exposed, and healthy leaves per plot using a chlorophyll meter (Chlorophyll Meter SPAD-502; Minolta Co., Ltd

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Humberto Núñez-Moreno, James L. Walworth, Andrew P. Pond and Michael W. Kilby

from 2006 to 2008 was unaffected by treatments. The increase in TCSA was slightly higher for the Zn-EDTA treatment than the rest of the treatments; however, differences were not significant. Chlorophyll indices ranged from 47.5 to 48.0 in 2007 and from

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Humberto Núñez-Moreno, James L. Walworth and Andrew P. Pond

from ‘Choctaw’ pecan trees in spring flush shoots growing in Georgia, where leaflets had 18.5 cm 2 /leaflet ( Andersen and Brodbeck, 1988 ). Published data regarding chlorophyll indices of pecan leaves are uncommon, but it is known that leaf chlorophyll

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Dámaris L. Ojeda-Barrios, Eloísa Perea-Portillo, O. Adriana Hernández-Rodríguez, Graciela Ávila-Quezada, Javier Abadía and Leonardo Lombardini

( Bremner, 1965 ). Table 2. Leaf sampling times and the corresponding phenological stages during the 3 years of the experiment. z Leaflet area and SPAD chlorophyll indices were determined in all 40 leaflets per tree. SPAD was measured using a SPAD 502 m

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Juan Carlos Díaz-Pérez and Kelly St. John

). Plant growth and chlorophyll index. Plant height and stem diameter were measured weekly for 5 weeks from mid-May to mid-June in three mature plants per plot. Chlorophyll indices (CI) were measured weekly on six leaves per plot using a chlorophyll meter

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Juan Carlos Díaz-Pérez and James E. Hook

at the University of Georgia Agricultural & Environmental Services Laboratories, Athens, GA. Leaf chlorophyll index. Chlorophyll indices were determined on 30 June (Spring 2005) on six mature, well-exposed, and healthy leaves per plot using a

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Jackson Teixeira Lobo, Ítalo Herbert Lucena Cavalcante, Augusto Miguel Nascimento Lima, Yuri Alysson Carvalho Vieira, Pedro Igor Rodrigues Modesto and Jenilton Gomes da Cunha

, chlorophyll indices ( Table 4 ) were not associated with nitrogen content ( Table 5 ) due to high N concentrations, a condition in which chlorophyll meter readings are not influenced by N content ( Blackmer and Schepers, 1994 ). Similar to the present study