Search Results

You are looking at 41 - 50 of 99 items for :

  • "capacitance" x
  • User-accessible content x
Clear All
Free access

Peter Alem, Paul A. Thomas, and Marc W. van Iersel

Nemali and van Iersel (2006) was used to maintain θ at the desired thresholds. The irrigation system used two capacitance soil moisture sensors (EC-5; Decagon, Pullman, WA) per plot (six pots on the same irrigation line). The two sensors were inserted

Free access

Xue-Min Hou, Zi-Hua Wang, Xi-Min Deng, and Guo-Hui Li

( Joly and Zaerr, 1987 ) and cyclamen leaves ( Richter, 1978 ). From full hydration to the TLP, ψ w of apple cortex decreased from zero to –1.74 MPa. Specific water capacitance (change in R * per change in ψ w ) was calculated as 15.1% MPa −1

Free access

Marc W. Van Iersel, Sue Dove, Jong-Goo Kang, and Stephanie E. Burnett

similar to the one described by Nemali and van Iersel (2006) . Two capacitance sensors (EC-5; Decagon, Pullman, WA) were inserted into the substrate in each container at an ≈45° angle with the thin edges of the sensors facing to top and bottom of the

Full access

Xunzhong Zhang, Mike Goatley, Jamie Conner, Megan Wilkins, Inna Teshler, Jun Liu, Michael Fefer, and Wenzi Ckurshumova

21.1% ± 0.21% (standard error) and at –1.5 MPa were 6.2% ± 0.02%. The capacitance-probe measurements of in-pot volumetric moisture (0–8 cm depth) at day 0 averaged 34.2% ± 0.21%. The pots lost moisture uniformly and no significant differences in soil

Full access

Adam F. Newby, James E. Altland, Daniel K. Struve, Claudio C. Pasian, Peter P. Ling, Pablo S. Jourdan, J. Raymond Kessler, and Mark Carpenter

., 2017 ). Such on-demand systems can use container weight or capacitance sensor readings to estimate substrate water content ( Nemali and van Iersel, 2006 ; Owen et al., 2008 ; Sammons and Struve, 2008 ). Many studies have been conducted that evaluate

Free access

Julián Miralles-Crespo and Marc W. van Iersel

‘Siskiyou Pink’) ( Burnett and van Iersel, 2008 ) and petunia ( Petunia × hybrida ) ( van Iersel et al., 2010 ). This irrigation system determines θ with capacitance sensors connected to a datalogger. The datalogger can control irrigation by opening and

Full access

Marc W. van Iersel, Matthew Chappell, and John D. Lea-Cox

distribution in containers can affect the variability in VWC measurements. Fig. 2. Substrate volumetric water content and its standard deviation [top ( n = 16)] in green roof platforms over an 8-month period as measured at noon using capacitance soil moisture

Free access

Peter Alem, Paul A. Thomas, and Marc W. van Iersel

levels of 0.10, 0.20, 0.30, or 0.40 m 3 ·m −3 and the eight CRF treatments were assigned to the 32 trays in a factorial design. Two capacitance soil moisture sensors (EC-5; Decagon, Pullman, WA) were inserted diagonally into the substrate of each tray

Full access

John D. Lea-Cox, William L. Bauerle, Marc W. van Iersel, George F. Kantor, Taryn L. Bauerle, Erik Lichtenberg, Dennis M. King, and Lauren Crawford

for using WSNs for precision irrigation scheduling. A conventional sensor-based approach typically provides information to schedule irrigation events based on soil moisture content, either through direct measurements with capacitance or time domain

Free access

Lucas O’Meara, Matthew R. Chappell, and Marc W. van Iersel

changes accurately reflected transpiration. Substrate VWC was also measured every 10 s using capacitance soil moisture sensors (10HS; Decagon Devices, Pullman, WA) calibrated specifically for this substrate. Average plant weight and VWC measurements were