Low-cost sensor tracks soil pH continuously for months across varied soils
At first glance, a farm field doesn't seem all that complicated. It's just dirt and crops.
A team of researchers at the University of Colorado Boulder have created an affordable sensor designed to monitor soil pH continuously for extended periods. Traditionally, pH measurements have been challenging to track in real time, but this new technology could help farmers better manage their land and improve food production. The sensor, made using a pH-sensitive dye called alizarin, provides reliable readings even in various soil conditions.
Traditional pH sensors often have issues, such as fragility and frequent recalibration, making them impractical for long-term field use. The new sensor, designed as a circuit-board-based device, can be manufactured at a low cost and deployed in the field. Tests showed that the sensor delivered accurate pH measurements for months across different soil types, including those with varying organic matter, texture, and compaction levels.
This breakthrough represents a significant step towards making long-term soil monitoring more accessible and practical for farmers.
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