Simple parallel probe as soil moisture sensor for sandy land in tropical-coastal areas

Arief Sudarmaji, . and Saparso, . and Hadi Supriyo, . and Anteng Widodo, . Simple parallel probe as soil moisture sensor for sandy land in tropical-coastal areas. pp. 829-838. ISSN 2231-8526

One potential land in marginal areas able to be utilized for keeping the sustainability of agriculture in Indonesia is coastal areas. However it requires optimum treatment especially in using the water for plants efficiently due to the factors of land characteristics and climate. This paper describes the use of simple and low-cost soil moisture probe for sandy land in the coastal area. The probe is a parallel plate which separated at a certain distance. The principle is based on soil electrical conductivity which delivers the electrical current from one plate to another. Two designs (single and double) and two distances (3 mm and 5 mm) of probes were tested to measure the sandy soil at the moisture content of 0 0.05 0.1 0.15 0.2 0.25 0.3 35 and 40. It was found that the resistance of probes was inversely proportional to water content but not linear. The best fit of probe resistance (X) to the moisture of sandy soil (Y) was of the 5 mm double parallel probe with the equation Y -10.33 ln(X) 128.13 (R is 0.9199) and non-linearity of 62.88. The probes and a built soil moisture logger/ controller were applied for sandy soil of Shallot cultivation land at coastal area in Empurancak Beach Jepara (located about 150m from the foreshore).

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Abstract

One potential land in marginal areas able to be utilized for keeping the sustainability of agriculture in Indonesia is coastal areas. However it requires optimum treatment especially in using the water for plants efficiently due to the factors of land characteristics and climate. This paper describes the use of simple and low-cost soil moisture probe for sandy land in the coastal area. The probe is a parallel plate which separated at a certain distance. The principle is based on soil electrical conductivity which delivers the electrical current from one plate to another. Two designs (single and double) and two distances (3 mm and 5 mm) of probes were tested to measure the sandy soil at the moisture content of 0 0.05 0.1 0.15 0.2 0.25 0.3 35 and 40. It was found that the resistance of probes was inversely proportional to water content but not linear. The best fit of probe resistance (X) to the moisture of sandy soil (Y) was of the 5 mm double parallel probe with the equation Y -10.33 ln(X) 128.13 (R is 0.9199) and non-linearity of 62.88. The probes and a built soil moisture logger/ controller were applied for sandy soil of Shallot cultivation land at coastal area in Empurancak Beach Jepara (located about 150m from the foreshore).

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Item Type:	Article
AGROVOC Term:	Sandy soils
AGROVOC Term:	Coastal area
AGROVOC Term:	Soil analysis
AGROVOC Term:	Sensors
AGROVOC Term:	Soil moisture
AGROVOC Term:	Moisture content
AGROVOC Term:	Water content
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9361

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