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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

Open access

Crysta N. Harris, Ryan W. Dickson, Paul R. Fisher, Brian E. Jackson, and Anissa M. Poleatewich

determined by nondestructively measuring leaf SPAD chlorophyll index for each replicate using a portable leaf SPAD meter (Minolta leaf SPAD meter; Spectrum Technologies). Each replicate value was the average of five leaf SPAD chlorophyll measurements from

Open access

Hong Su, He Zhang, Chaoxia Wang, Jianquan Huang, Jiayin Shang, Na Zhang, Dan Wang, and Kai Li

Bio Science, Inc., Camas, WA), and the leaf SPAD value was measured with a chlorophyll meter (SPAD-502; Minolta Co., Japan). Root length, surface area and projected area, and the number of root tips were scanned and analyzed using a root analysis

Open access

Sara Andrea Moran-Duran, Robert Paul Flynn, Richard Heerema, and Dawn VanLeeuwen

. Heerema et al. (2014) suggested monitoring leaf greenness (i.e., SPAD) on pecan fruiting shoots to plan for an efficient N application in late-season to sustain optimum P n levels. However, the interactions between N and Ni has not been studied

Open access

Yuqi Li and Neil S. Mattson

, and SPAD were measured. At the end of posttransplanted stage, stem length (from soil to the apical meristem), fresh weight (FW), DW, root index (RI), and SPAD readings were measured. The SPAD readings were quantified using a nondestructive dual

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Ki-Ho Son and Myung-Min Oh

pots). Growth characteristics. Growth characteristics such as the fresh and dry weights of shoots and roots, shoot/root ratio (S/R ratio), total leaf area, and chlorophyll content (SPAD value) were measured at 4 weeks after the onset of LED treatment

Open access

Yuru Chang, Lorenzo Rossi, Lincoln Zotarelli, Bin Gao, and Ali Sarkhosh

grape physiological performance. The chlorophyll values of the first four mature and healthy leaves from the growing point of each plant were recorded 35 and 54 d after transplanting with a portable SPAD 502 chlorophyll fluorimeter (Konica Minolta, Tokyo

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Giuseppe Colla, Carolina María Cardona Suárez, Mariateresa Cardarelli, and Youssef Rouphael

the following order: 1) to select among commercial melon rootstocks for improved NUE through the measurement of crop traits (shoot dry biomass, leaf area, root-to-shoot ratio, SPAD index, shoot N uptake, and nitrate reductase activity) at early

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Genhua Niu, Denise S. Rodriguez, and Lissie Aguiniga

damage (acceptable as landscape performance); and 5 = excellent with no foliar damage. Leaf greenness or relative chlorophyll concentration (measured as the optical density, SPAD reading) was recorded at the end of the experiment on three leaves per

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Guihong Bi, Williams B. Evans, and Glenn B. Fain

harvested 5 weeks after transplanting. At harvest, leaf greenness (chlorophyll content) was quantified using a SPAD-502 Chlorophyll Meter (Minolta Camera Co., Ramsey, NJ). For each plant, three recently fully expanded leaves were randomly chosen for SPAD