| Full text | |
| Author(s): |
Schwamback, Dimaghi
;
Persson, Magnus
;
Berndtsson, Ronny
;
Bertotto, Luis Eduardo
;
Kobayashi, Alex Naoki Asato
;
Wendland, Edson Cezar
Total Authors: 6
|
| Document type: | Journal article |
| Source: | SENSORS; v. 23, n. 5, p. 18-pg., 2023-03-01. |
| Abstract | |
Automated soil moisture systems are commonly used in precision agriculture. Using low-cost sensors, the spatial extension can be maximized, but the accuracy might be reduced. In this paper, we address the trade-off between cost and accuracy comparing low-cost and commercial soil moisture sensors. The analysis is based on the capacitive sensor SKU:SEN0193 tested under lab and field conditions. In addition to individual calibration, two simplified calibration techniques are proposed: universal calibration, based on all 63 sensors, and a single-point calibration using the sensor response in dry soil. During the second stage of testing, the sensors were coupled to a low-cost monitoring station and installed in the field. The sensors were capable of measuring daily and seasonal oscillations in soil moisture resulting from solar radiation and precipitation. The low-cost sensor performance was compared to commercial sensors based on five variables: (1) cost, (2) accuracy, (3) qualified labor demand, (4) sample volume, and (5) life expectancy. Commercial sensors provide single-point information with high reliability but at a high acquisition cost, while low-cost sensors can be acquired in larger numbers at a lower cost, allowing for more detailed spatial and temporal observations, but with medium accuracy. The use of SKU sensors is then indicated for short-term and limited-budget projects in which high accuracy of the collected data is not required. (AU) | |
| FAPESP's process: | 19/24292-7 - Infiltration and runoff dynamics under different land uses and climate change in the Brazilian Cerrado area |
| Grantee: | Dimaghi Schwamback |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 15/03806-1 - Water availability and quality threats in a Guarani Aquifer System outcrop zone |
| Grantee: | Edson Cezar Wendland |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Thematic Grants |
| FAPESP's process: | 21/14016-2 - Hydrus model for the theoretical representation of vertical flow under different land uses commonly found in the Brazilian Cerrado biome |
| Grantee: | Dimaghi Schwamback |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |