Agricultural producers could, in the future, make use of better forecasts to more efficiently irrigate their fields using a Purdue-developed technology that could more accurately sense soil moisture below the surface through measuring the reflections of communication satellite signals.
“The reflectivity of the surface is a function of the soil moisture, and that allows us to quantify the amount of moisture in the soil so, if necessary, growers can take corrective actions to protect their crops,” said James Garrison, a professor in Purdue’s School of Aeronautics and Astronautics, and Electrical and Computer Engineering (by courtesy). “The technology we’re developing can be cost effective.
“Water is becoming more and more scarce. So, managing the water that is available is becoming increasingly important. To manage it you need to be able to accurately determine the amount being used. The key there is to measure how much of it is in the soil where most of it is absorbed by the plants’ roots.”