Drones seed 15-acre restoration at Idukki estate
Harrisons Malayalam Limited used drone seeding to distribute 1,12,178 seeds over 15 acres of land in Idukki, replanting a native mix after removing eucalyptus monoculture. A five-year establishment target aims for about 30,000 plants overall.
Key takeaways
- HML used drone technology to distribute over 1.1 lakh seeds across 15 acres of former eucalyptus land in Idukki.
- A 24-species native plant assemblage was introduced, sourced from the KFRI seed bank.
- Baseline biodiversity assessment found 24 native species in/around the site and noted eucalyptus monocultures degrade soil conditions and native biodiversity.
- The project targets about 30,000 plants in total by the end of a five-year establishment period.
What Happened
A tea plantation company, Harrisons Malayalam Limited (HML), carried out an eco-restoration project at the Pattumallay Estate near Peerumade hills in Idukki, Kerala. The initiative replaced a 15-acre eucalyptus monoculture with a 24-species native assemblage sourced from the Kerala Forest Research Institute seed bank. Drone seeding was used to distribute 1,12,178 seeds across the site, employing both aerial dispersion and seed balls. The effort is described by HML officials as a model they intend to replicate in other areas.
In addition to the seed distribution, HML noted that drone-based transport trials were conducted at the nearby Lockhart Estate near Devikulam in Munnar to move freshly harvested green leaves to weighment centres and processing factories.
Why It Matters
The restoration effort followed a Rapid Biodiversity Assessment that preceded the planting. The baseline survey identified 24 native species in and around the site and indicated that eucalyptus monocultures can deplete soil moisture, suppress undergrowth, and reduce native biodiversity. The project situates itself as an ecological intervention intended to restore native vegetation and soil conditions in a landscape adjacent to Parunthumpara hills.
Officials indicate the drone approach is chosen to improve coverage uniformity, reduce labour and limit soil disturbance during establishment, with a five-year timeline expected to yield a plant density of 5,000 individuals per hectare (totaling about 30,000 plants by year five).
Background
The Pattumallay Estate is described as being near Peerumade in Idukki, where the eucalyptus stand was identified for replacement. The 24 native species came from the KFRI seed bank, and the species list includes Terminalia bellirica, Spondias pinnata, Albizia falcataria, Phyllanthus emblica, and Wrightia tinctoria, among others named by officials.
Key Facts
- Location: Pattumallay Estate, near Peerumade, Idukki, Kerala.
- Size of restored area: 15 acres.
- Method: Drone seeding and seed ball application for seed distribution.
- Seed source: Kerala Forest Research Institute seed bank.
- Species mix: 24 native species (trees, shrubs, herbs, lianas).
- Seed count distributed: 1,12,178 seeds.
- Target plant density: 5,000 plants per hectare (about 30,000 plants in total) by end of a five-year period.
- Pre-restoration assessment: Rapid Biodiversity Assessment confirmed 24 native species in/around the site; eucalyptus monoculture linked to reduced soil moisture and biodiversity.
- Additional related activity: Drone-based transport trials at Lockhart Estate near Devikulam, Munnar.
What Happens Next
Officials say the model will be replicated in other areas, implying expansion of drone-assisted restoration for similar landscapes. The five-year establishment plan indicates ongoing monitoring to reach the stated plant density, though no specific monitoring milestones beyond the density target were provided in the materials.
Sources reviewed
Project Chintan independently synthesized and analyzed information cross-checked across the sources listed above.
