The challenge
In controlled-environment growing, the oxygen available to the root zone sets the ceiling on root health, and with it on yield. Nutrient solutions often run short of dissolved oxygen, especially by the far end of a long drip line, and the roots pay the price.
A four-hectare hydroponic tomato farm in the Netherlands wanted to raise the oxygen reaching its roots, quickly, and without re-engineering its irrigation.
What we did
We treated the nutrient solution to raise its dissolved oxygen non-mechanically, so the lift carried through the system rather than dissipating at the pump.
Oxygen was measured at the source and again at the end of the drip line, and root development was observed over three months.
The result
Tripled at source, and it held to the end of the line.
The oxygen lift did not fall away down the line, and the treated roots were visibly stronger over three months of observation.
This result was documented by the grower. The mechanism behind it, that lifting root-zone oxygen improves root mass, yield and water-use efficiency, is independently supported in the peer-reviewed literature.
Why it matters
For controlled-environment and urban growers, root-zone oxygen is one of the most direct levers on root health and yield. This shows it can be raised sharply and held across the system, without re-engineering the irrigation. It is the kind of input-efficiency gain the agriculture and urban-farming sector depends on.
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