WE tend to take trees for granted, in our parks, estates and gardens, as a natural part of the landscape. All too often they are subjected to stress as a result of a number of factors such as nutrient shortages in the soil, surface compaction due to foot traffic and waterlogging where water drains off hard surface pathways.

Terrain Aeration has been treating trees in all types of situation for over 25 years, from back gardens to large estates right through to Royal Parks.

The Terrain Aeration Terralift machines comprise a probe which reaches one-metre depth, deeper than the roots of trees (other than the major tap roots which grow straight down).

Breaking up the soil around the roots and beyond means that excess water will drain away from the roots to help stop anaerobic conditions and rotting of the root system. The probe is then used to inject dried seaweed which helps keep the fissures open and backfilling the probe holes with aggregate provides a semi-permanent aeration/ventilation shaft.

Terrain Aeration aerates around the roots using two-metre spacings – on most occasions one-metre inside and one-metre outside the canopy drip line, as this is where the growing roots lie. Decompacting around the roots and injecting air into the soil increases the percentage of uptake of oxygen into the root system.

In one particular situation it was found there was a magnesium deficiency coupled with low overall soil fertility around trees in a park. This was determined using new technology to measure light transmission through the leaves on the trees to gain a reading of chlorophyll levels.

The likely cause of the problem was that leaf litter is always removed and had been for a century, taking with it the natural nutrients from decaying leaves. There was also severe compaction of the surface around the tree.

A tree feed mix containing slow release general nutrients and magnesium was injected, using the Terralift’s ability to inject granular material via its seaweed carrier, forcing it upwards into the root zone of the trees. This also avoids losing the nutrients to the grass which would occur with surface treatment. Two Terralift machines were used to carry out the process.


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