How to Build a Remote Agricultural Monitoring System for Smarter Irrigation Decisions

Managing irrigation across multiple fields is not always straightforward. Soil moisture can vary from one location to another, rainfall may be uneven, and the availability of water in reservoirs or canals can change over time. For farms and agricultural projects, making decisions based only on fixed irrigation schedules or occasional manual inspections may not provide enough information.

A remote agricultural monitoring system helps users collect and review field data from different locations. By combining soil sensors, weather monitoring equipment, water level and flow measurement devices, and IoT data acquisition technology, agricultural managers can gain a clearer understanding of soil conditions and irrigation water availability.

For farm operators, agricultural contractors, and system integrators, the key is to select monitoring equipment that matches the actual project requirements.

1. Start with Soil Moisture Monitoring

Soil moisture is one of the most useful measurements for understanding water conditions in agricultural fields. Monitoring soil moisture over time helps farm managers observe how soil water content changes after rainfall or irrigation.

A soil moisture monitoring system can be installed at selected locations and depths to represent different field conditions. For larger farms, sensor placement should consider soil characteristics, crop type, irrigation zones, and differences in terrain.

Depending on the monitoring objectives, agricultural projects may also require soil temperature, electrical conductivity (EC), or pH measurements.

These parameters provide additional information about the soil environment. However, they should be interpreted according to the sensor type and local conditions. For example, soil EC is not a direct measurement of every nutrient in the soil.

Combining several relevant soil measurements gives agricultural managers more information for evaluating field conditions and reviewing irrigation practices.

2. Combine Soil Data with Weather Monitoring

Soil measurements show conditions within the field, while weather observations help explain environmental changes that may affect water demand.

An agricultural weather station can collect parameters such as air temperature, relative humidity, rainfall, wind speed, and wind direction. Solar radiation may also be included when required by the project.

Rainfall records can help users evaluate whether a recent rain event may have replenished soil moisture. Temperature, humidity, wind, and solar radiation provide additional context for understanding atmospheric conditions and potential water loss.

When combined with soil moisture trends, weather data supports a more informed approach to irrigation planning.

For projects that require evapotranspiration calculations, the available weather parameters must match the requirements of the selected calculation method. A monitoring station provides measurements; it does not automatically guarantee accurate irrigation recommendations without suitable models and agronomic information.

3. Monitor Irrigation Water Sources

Agricultural monitoring should not stop at the field. The availability of irrigation water is another important factor in water resource management.

Water may be supplied from wells, rivers, canals, reservoirs, or storage tanks. Depending on the site and measurement requirements, water level sensors can monitor water levels in suitable storage or supply locations.

Flow monitoring equipment can measure water movement at selected points, such as a water intake or supply pipeline, when the installation conditions are suitable for the chosen technology.

These measurements help users understand water availability and review supply conditions alongside soil and weather data.

For example, a farm manager may review soil moisture trends and reservoir water levels together when assessing whether field conditions and available water resources support the planned irrigation schedule.

The appropriate sensor type depends on the water source, installation environment, measurement range, and project requirements.

4. Connect Field Sensors to a Remote Monitoring Platform

Collecting measurements is only part of the process. For distributed agricultural projects, users also need a reliable way to acquire, transmit, and review data.

A typical remote agricultural monitoring architecture includes:

• Field sensors: Soil moisture sensors, weather stations, water level sensors, and suitable flow monitoring equipment.

• Data acquisition equipment: RTUs or data loggers collect measurements from connected devices.

• Communication equipment: Suitable 4G or LoRa communication configurations transmit data according to site conditions and system design.

• Monitoring platform: A cloud platform or customer application allows authorized users to review available measurements from different locations.

The actual architecture depends on sensor interfaces, communication coverage, power supply, installation distances, and data management requirements.

For agricultural projects that already use their own software, API integration may be considered when supported by the selected system configuration. This allows project developers to evaluate how monitoring data can be incorporated into their existing applications.

KEHAO provides environmental monitoring sensors, data acquisition equipment, and IoT monitoring solutions for agricultural and water resource applications. Its equipment can be configured according to project requirements rather than assuming that every farm needs the same combination of sensors.

 

5. Choose a Monitoring Configuration for the Farm

Different agricultural applications require different monitoring arrangements.

For open-field crop production, soil moisture monitoring combined with local weather observations may provide useful information for reviewing irrigation requirements.

For orchards and horticultural farms, sensor locations should reflect root-zone conditions and the layout of the irrigation network.

For large farms with multiple fields or water sources, distributed sensors and remote data acquisition equipment can help organize measurements from different monitoring points.

Projects with limited access to mains electricity may also need to consider suitable solar power configurations, depending on the equipment's power requirements and local environmental conditions.

A practical monitoring plan should begin with a clear list of required parameters, measurement locations, communication conditions, and data access requirements. This information helps determine which sensors and supporting devices are appropriate for the project.

6. Working with an Agricultural Monitoring Equipment Supplier

Selecting monitoring equipment involves more than comparing individual sensor specifications. Agricultural project contractors and system integrators should also consider sensor compatibility, installation conditions, communication options, data access, and the availability of technical documentation.

KEHAO provides monitoring equipment and solutions across agriculture, hydrology, water resources, meteorology, and environmental monitoring. Its agricultural monitoring options include soil sensors, weather stations, water level and flow monitoring equipment, RTUs, and related data acquisition solutions.

You can learn more about KEHAO's agricultural monitoring station and explore how suitable monitoring components may fit your project.

For a project-specific configuration, the required parameters, sensor locations, communication method, power supply, and platform requirements should be identified before selecting the final equipment combination.

Conclusion

A remote agricultural monitoring system connects information about soil conditions, local weather, and irrigation water availability. By reviewing these measurements together, farm managers and agricultural project teams can make better-informed decisions about irrigation management and water resource use.

The most suitable system is not necessarily the one with the largest number of sensors. It is the one that collects the right data, communicates reliably under site conditions, and provides information in a format that users can understand and apply.

KEHAO supports agricultural and environmental monitoring projects with sensors, data acquisition equipment, and IoT integration options. To discuss your requirements, visit the KEHAO contact page and share your monitoring objectives.