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Shuyang Zhen and Stephanie E. Burnett

fertilizer applications because of reduced fertilizer waste, and have increased profitability. Fig. 1. Daily average substrate volumetric water content (θ = volume of water ÷ volume of substrate) throughout the experimental period for ‘Munstead’ ( A ) and

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Yong Ha Rhie and Jongyun Kim

calculated from sandbox data using the difference of volumetric water content between 1 and 5 kPa suctions, and 5 and 10 kPa suctions, respectively. Capacitance sensor VWC calibration for various mix ratios. For our sensor-specific calibrations with various

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Stephanie E. Burnett and Marc W. van Iersel

or too large to install in the small containers typically used in greenhouse container crop production. However, new, small capacitance sensors (EC-5; ≅5 cm × 2 cm; Decagon Devices, Pullman, WA) accurately estimate substrate volumetric water content

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Martin P.N. Gent and Richard J. McAvoy

from PSEFW. Water stress may be used to control plant growth and quality. A constant low volumetric water content can control both biomass and height growth of ornamental plants ( Burnett et al., 2005 ; Van Iersel et al., 2004), although the extent of

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Philip J. Brown, Lambert B. McCarty, Virgil L. Quisenberry, L. Ray Hubbard Jr., and M. Brad Addy

on SWCs, the air entry point was assigned at 12.5 cm. Volumetric water content decreased rapidly (0.39 to 0.05 cm 3 ·cm –3 ) as the matric potential increased from 12.5 to 30 cm, which is common in sands with a narrow range in pore diameters ( McCarty

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Whitney N. Griffin, Steven M. Cohan, John D. Lea-Cox, and Andrew G. Ristvey

herein were extrapolated directly from dry weight of each replicate and thus are actual measurements of VWC. Fig. 1. In-pot volumetric water content for 500 mL containers planted with Phedimus kamtschaticus in three different green roof substrates with

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Patrice Cannavo, Houda Hafdhi, and Jean-Charles Michel

replicates, three were used for volumetric water content measurement ( Fig. 1A ). The other three were used for water retention curve measurements. In P replicates, three were used for gravimetric water content measurement, six for shoot weight and root

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Lenny Wells

on pecan occurred at ≈−0.78 MPa using the pressure chamber to measure stem ψ. Regression analysis suggests that irrigation scheduling for mature pecan trees may be needed when volumetric water content reaches ≈10% on Tifton loamy sand soil. Water

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Erin J. Yafuso, Paul R. Fisher, Ana C. Bohórquez, and James E. Altland

volumetric water content (VWC) and volumetric air content (VAC) for the three propagation substrates at container capacity. Substrate solid, content was estimated by gravimetric analysis and solid values (22% for peat, 8% for rockwool, and 2% for foam) were

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Paraskevi A. Londra, Maria Psychoyou, and John D. Valiantzas

relationship between unsaturated hydraulic conductivity and volumetric water content, K ( θ ), is necessary for the selection of substrates for plant growth and the proper management of irrigation. Although θ ( h ) for substrates is easily determined in the