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Calibrating capacitance sensors to e...

Arguedas Rodriguez, Felix Ruben.

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Calibrating capacitance sensors to estimate water content, matric potential, and electrical conductivity in soilless substrates.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Calibrating capacitance sensors to estimate water content, matric potential, and electrical conductivity in soilless substrates./
作者:	Arguedas Rodriguez, Felix Ruben.
面頁冊數:	137 p.
附註:	Source: Masters Abstracts International, Volume: 48-06, page: 3477.
Contained By:	Masters Abstracts International48-06.
標題:	Agriculture, Horticulture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1478116
ISBN:	9781124075464

Calibrating capacitance sensors to estimate water content, matric potential, and electrical conductivity in soilless substrates.
Arguedas Rodriguez, Felix Ruben.

Calibrating capacitance sensors to estimate water content, matric potential, and electrical conductivity in soilless substrates. - 137 p.

Source: Masters Abstracts International, Volume: 48-06, page: 3477.

Thesis (M.S.)--University of Maryland, College Park, 2009.

The nursery and greenhouse industry requires precise methods to schedule irrigations, since current practices are subjective and contribute to water and nutrient runoff. Capacitance sensors were calibrated to precisely estimate substrate water content, matric potential, and pore water electrical conductivity (EC) in five soilless substrates. Regression coefficients (R2) ranged from 0.29--0.88 and 0.16--0.79 for water content in 5-cm and 20-cm column heights; matric potential R2 ranged from 0.10--0.98 and 0.79--0.98, respectively. Pore water EC calibrations were investigated, contrasting two sensor types and two prediction models. Results were applied to an empirical greenhouse dataset. Better precision and accuracy were achieved with ECH2O-TE sensor and Rhoades model. Capacitance sensors provide precise estimates of plant-available water in most soilless substrates, while pore water EC accuracy and precision depends on the sensor-model combination. These results will enable growers to precisely schedule irrigations based on water content and pore water EC.

ISBN: 9781124075464Subjects--Topical Terms:

1017832
Agriculture, Horticulture.

Calibrating capacitance sensors to estimate water content, matric potential, and electrical conductivity in soilless substrates.
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500 $a Adviser: John D. Lea-Cox.
502 $a Thesis (M.S.)--University of Maryland, College Park, 2009.
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