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Gerald Henry, Rebecca Grubbs, Chase Straw, Kevin Tucker, and Jared Hoyle

moisture gradient levels (DWT). Table 1. Correlation coefficients among turfgrass quality (TQ), normalized difference vegetation index (NDVI), canopy temperature (CT), root biomass (RB), and depth to water-table (DWT) for ‘Tifway 419’ hybrid

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Amy L. Neigebauer, Garald L. Horst, Donald H. Steinegger, and Greg L. Davis

Significant research has been conducted on wildflower sod, but the reasoning behind the production system methods is not clear. The purpose of this research was to determine the influence of mowing height on the subsequent leaf growth and root biomass distribution in a wildflower sod production system. Rudbeckia hirta was grown in sand in polyvinyl chloride (PVC) tubes in simulating field conditions. Plants were either not mowed (control) or hand-clipped to 5.1, 7.6, or 10.2 cm to simulate mowing. After the initial mowing, plants were mowed at ≈7-day intervals. Total root depth, number of root axes in the top 2.5 cm, root: shoot ratio, total root dry weight, and root dry weight at depths of 0.0-2.5, 2.5-21.7, 21.7-40.8, and 40.8-60.0 cm were measured at the end of the study. Comparing the total root dry weight of all segments indicates that mowing significantly reduces root biomass. As mowing height increased, the depth of longest root increased linearly. Plants not mowed or plants mowed to 10.2 cm produced significantly more root axes in the top 2.5 cm of sand than did mowing heights of 5.1 or 7.6 cm. Root dry weight in the top 2.5 cm was considerably greater in nonmowed plants. Increased root axes in sod with higher mowing heights indicated a greater root density, which may also increase wildflower sod stability.

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John R. Yeo, Jerry E. Weiland, Dan M. Sullivan, and David R. Bryla

dry shoot and root biomass between the inoculated and noninoculated plants within each cultivar ( Allardyce et al., 2012 ). Relative root and shoot biomass was calculated for each inoculated plant by dividing its root and shoot biomass by the average

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Junhuo Cai, Junjun Fan, Xuying Wei, and Lu Zhang

–December). Root biomass correlated weakly and negatively with flower biomass ( R = –0.287, P = 0.174), bulb biomass correlated moderately negatively with flower biomass ( R = –0.566, P = 0.004), and leaf biomass correlated moderately positively with flower

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

final sampling (N = 16) and two-way analysis of variance full factorial reports for the significance of effects and interactions for location, month, and treatment. Total root biomass. Total root biomass was affected by the sampling period, and treatment

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Amy L. Shober, Kimberly A. Moore, Christine Wiese, S. Michele Scheiber, Edward F. Gilman, Maria Paz, Meghan M. Brennan, and Sudeep Vyapari

grown in Zones 8b and 9a. In Zone 10b, the root:shoot biomass ratio was larger at 104 weeks after transplanting for plants irrigated every 2 d as a result of increased root biomass for these plants compared with the plants irrigated every 4 d (data not

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Daniel E. Wells, Jeffrey S. Beasley, Lewis A. Gaston, Edward W. Bush, and Maureen E. Thiessen

%, from 5.55 to 4.00 g, when plants were fertilized with 100% PLA compared with 100% SP. However, shoot:root biomass ratios did not differ between any P treatments. In 2012, when shoot growth responses between 100% SP- or PLA-fertilized plants were

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David Jespersen and Brian Schwartz

percentage green cover ( Marcum et al., 1995 ). Another study that also looked at rooting characteristic of well-watered plants in greenhouse conditions, and then compared those results to field conditions, also found that RLD and root biomass from the middle

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Patrice Cannavo, Houda Hafdhi, and Jean-Charles Michel

irrigation sheet saturated with water. At Day 0, cuttings of impatiens were carefully potted to avoid modifying the initial peat bulk density. Moreover, six cuttings were analyzed for initial root biomass and shoot weight. The experiment lasted for 196 d

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Gabriele Amoroso, Piero Frangi, Riccardo Piatti, Francesco Ferrini, Alessio Fini, and Marco Faoro

percentage of deformed roots on relative to total root biomass (w/w) in littleleaf linden and field elm seedlings grown for one season (2008) in three 1-L containers. Table 2. Shoot and root dry biomass (g) and percentage of deformed roots on relative to