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Title: Design of a Multilevel - TDR Probe for Measuring Soil Water Content
Authors: Adelakun, Idris Ademuyiwa
Supervisor: Ramanathan, Sri Ranjan (Biosystems Engineering)
Examining Committee: Kristopher, Dick (Biosystems Engineering), Wole, Akinremi (Soil Science)
Graduation Date: February 2013
Keywords: Multilevel - TDR Probe
Soil water content
Issue Date: 30-Nov-2012
Abstract: ABSTRACT The TDR measures soil water content by measuring the travel time of an electromagnetic step pulse through a wave guide embedded in the soil. Damage during insertion and retrieval of the probe makes it unsuitable for repeated use. A multilevel-TDR probe with adequate protection for cable was designed and tested to overcome this problem. Each section of the multilevel-TDR probe was constructed by embedding a 60 mm centre rod and a 63 mm outer loop in grooves on the outer wall of a 200 mm section of PVC pipe. Fifteen such probes were tested in the laboratory and the field by comparing it with the weighing method. Regression analysis between TDR-ϴv and weighing method-ϴv showed good correlation with an R2 of 0.97 and 0.98 during two laboratory experiments and 0.51 during the field experiment. This multilevel probe is cost effective, reusable and can measure soil water content at different depths.
Appears in Collection(s):FGS - Electronic Theses & Dissertations (Public)
Manitoba Heritage Theses

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