Sub-surface trickle irrigation in cotton
In this excellent example of irrigation management in a cotton crop, the high resolution data of EnviroSCAN™ probes was used to optimize water efficiency.
Starting with a full profile in October, only five small irrigations were required before 1 December. From that point until 10 December supplementary irrigations combined with the moisture available at 50- 80cm depths supplied all the plants requirements. When the water at 80cm was used up, irrigations were increased to supply all the plant's needs.
The dry soil profile meant that when rain fell in late December, it was all captured in the profile with no leaching below the root zone. The same principle was then applied to the end of the season. This strategy resulted in optimum yield, quality and water-use efficiency for the site.