"Stunning water savings in Spanish greenhouses"

Clisol is a huge greenhouse complex in Almería, Spain, which was featured in a BBC documentary about agricultural innovation. As part of a drive towards greater efficiency, they decided to install the Aqua-4D system. The early signs showed the system having a positive impact, and on an October 2018 visit the Aqua-4D team advised frequent moisture measurement to maximize results, and eagerly awaited the follow-up visit in early 2019.

Hugo Gaignebet surveys the crops in Almería

Fast forward half a year, and these results have exceeded their wildest expectations.

After the advice they were given, each day for 120 days the grower, Fernando Díaz, noted the tensiometer readings – measurements which indicate how much moisture remains in the ground after the last irrigation. In this case, tensiometers were measuring two adjacent plots – one treated by Aqua-4D, and another control plot.

From the daily stats, it became clear to Díaz that the Aqua-4D plot required little irrigation as the soil was already moist. As this graph illustrates, tensiometer readings showed consistently more soil moisture compared to the control, and so irrigation time for the Aqua-4D plot was down to zero on many days:

Click here for a larger version.

There are two things to note here. Firstly, the Aqua-4D by its very nature enables water to penetrate the deep pores of soil, resulting in moister soils for longer. Secondly, the benefits of this are truly maxed out when the grower keeps track of this new-found soil moisture and changes irrigation practices – this is where the water savings truly come into play, as also observed in parallel projects in greenhouses in Holland, as well as open fields in California and Brazil.

In this particular case, the soil was 31% more moist, and the grower was then able to make 20% water savings by less frequent crop irrigation. This is a perfect example of technological change and human change working hand-in-hand. This is a big part of Aqua-4D’s work - its team of experts constantly visit client sites and consult on optimizing irrigation to get the most out of the company’s patented technology. As Field Engineer Hugo Gaignebet says: “Monitoring the humidity is essential in understanding the Aqua-4D system and adapting irrigation according to the specific soil situation”.

New technologies like Aqua-4D provide enormous, game-changing potential, and can be truly maximized when accompanied by subtle practical changes.

As this case shows, the results can then be exponentially positive – saving precious water, time and money.

For more information:
Aqua-4D Water Solutions

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