Greywater Reedbed Yearly Biochar Replacement

With the cold of Winter nearly upon us, the annual Biochar removal from the reedbed is conducted as the Vetiver has stopped growing for the year. With the cold weather comes lower char/soil temperatures and reduced biological activity which is hopefully negated by the replacement of ‘fresh’ char until the temperature improves. A ‘good’ reedbed needs to be removing the nitrates/phosphates and Vetiver does not grow well during Winter dormancy thereby possibly not converting nitrogen and phosphorus into green matter fast enough.

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Protecting Trees From Damage

Vetiver Grass can be used as borders to plantings but they also can supply other benefits. Seen here is a recent application of Vetiver hedges being used to protect a line of Albizia lebbeck pollards from getting hit with a mower deck during errant operation. As the Albizia will be cut back on a yearly/bi-yearly cycle, the shade should not have a negative effect on the hedge. The Vetiver will be cut for mulch and it will be placed in the internal area to reduce competition from the pasture grasses.

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Greywater Reedbed Biomass Reduction

As the temperature rises, the greywater outflow has been facilitating excessive Vetiver growth even during some of the driest and warmest conditions locally in historical record. This can be seen by the shorter growth in the non-outflow hedges.

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