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Russell Galanti, Alyssa Cho, Amjad Ahmad, and Theodore Radovich

compare the effects of these new and novel soil amendment treatments on yield and quality, leaf SPAD values, and root growth in mature macadamia orchards. The soil amendment treatments were expected to increase SPAD values, root growth, and potential yield

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Richard J. Heerema, Dawn VanLeeuwen, Marisa Y. Thompson, Joshua D. Sherman, Mary J. Comeau, and James L. Walworth

and g S had stabilized, typically 30–60 s after the chamber was clamped onto the leaf. Immediately after measuring gas exchange of a leaf, a portable chlorophyll meter (SPAD 502; Konica Minolta, Ramsey, NJ) was used to measure greenness midway

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Xiaoya Cai, Youping Sun, Terri Starman, Charles Hall, and Genhua Niu

without foliar damage. Leaf greenness index was measured by the non-destructive handheld chlorophyll meters [measured as the optical density, SPAD-502 reading (Minolta Camera Co., Osaka, Japan)] at the end of the experiment on four or six leaves at similar

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Gitta Shurberg, Amy L. Shober, Christine Wiese, Geoffrey Denny, Gary W. Knox, Kimberly A. Moore, and Mihai C. Giurcanu

content (SPAD) was estimated every 6 weeks using a portable chlorophyll meter (SPAD-502; Minolta Corp., Ramsey, NJ). Six readings were taken per plant cluster (two readings per plant) and averaged. Fisher et al. (2003) reported that SPAD is an indirect

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Limeng Xie, Patricia Klein, Kevin Crosby, and John Jifon

, Marysville, OH) mixed in 3.8 L of water was applied weekly. The SPAD value of the first three fully expanded leaves was measured on 11-week-old seedlings using a chlorophyll meter (SPAD-502 Plus; Konica Minolta Sensing, Tokyo, Japan; Monje and Bugbee, 1992

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Xiaojie Zhao, Guihong Bi, Richard L. Harkess, and Eugene K. Blythe

accumulation increasing leaf sensitivity to ethylene which enhanced chlorophyll loss ( Hsu et al., 2003 ). But, in some plants, NH 4 :NO 3 ratio had no effect on chlorophyll content or SPAD reading, such as in garlic mustard ( Alliaria petiolata ) ( Hewins and

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Yuqi Li and Neil S. Mattson

with reference solutions. Leaf chlorophyll index (SPAD) was quantified for all plants using a nondestructive dual-wavelength chlorophyll meter (Minolta SPAD-502 chlorophyll meter; Spectrum Technologies, Plainfield, IL) by averaging measurements from

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Sofia Flores, Marlon Retana-Cordero, Paul R. Fisher, Rosanna Freyre, and Celina Gómez

treatment replications. Data collected. In both experiments, relative chlorophyll content was measured every 2 weeks on fully expanded leaves from all plants using a SPAD meter (SPAD-502; Konica Minolta Sensing Inc., Osaka, Japan). Data were averaged

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Xiaojie Zhao, Guihong Bi, Richard L. Harkess, Jac J. Varco, Tongyin Li, and Eugene K. Blythe

inflorescences stems and inflorescence stem length), plant height (average height of the three tallest fans), and SPAD reading (SPAD-502; Minolta Camera Co., Japan, one of the first two fully expended leaves was selected to measure SPAD reading) were collected

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Hai-Fang Yang, Hye-Ji Kim, Hou-Bin Chen, Jillur Rahman, Xing-Yu Lu, and Bi-Yan Zhou

shoots from three replicate trees were collected and immediately frozen in liquid nitrogen. The SPAD values correspond to the amount of chlorophyll in leaves ( Wang et al., 2004 ; Yamamoto et al., 2002 ). SPAD values in leaves of the terminal shoots from