I have seen this being popular in the US, I was part of a trial system in the Vaalharts irrigation scheme in RSA where we installed a similar system in Pecans, problems we encountered was deep water tables so the passive nature of such a system tends to be the biggest drawback in those soils and semi arid climate conditions.

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I have seen this being popular in the US, I was part of a trial system in the Vaalharts irrigation scheme in RSA where we installed a similar system in Pecans, problems we encountered was deep water tables so the passive nature of such a system tends to be the biggest drawback in those soils and semi arid climate conditions.