Timber & Perennial Systems
Agroforestry
Reframing Eucalyptus: soil biology, not species choice, decides whether a tree helps or harms the land.
Like every PQNK crop, Agroforestry is governed by the same four principles: no soil disturbance, no inundation, permanent biological cover and maximum biodiversity. What follows is specific to Agroforestry — the engineering and management, not the underlying biology.
Overview
Environmentalists and farmers often disagree sharply about species like Eucalyptus in agroforestry systems. Pedaver's scientific note argues that plant behavior is a response to soil biological condition, not an inherent property of the species — Eucalyptus "exploits" water and degrades soil only where it is planted on already-dead soil.
PQNK Practices Applied
- Restore soil biology first — via hardpan breaking, pH correction, and Jantar cover cropping — before judging any species' suitability
- In fully restored soil, even fast-growing, nutrient-demanding species like Eucalyptus behave normally, without excessive transpiration or ecological stress
- Prioritize deep-rooted, high-root-exudation, continuous-biomass species as primary soil-regenerating trees in an agroforestry belt
- Species like Eucalyptus can be introduced afterward, once soil life is established, rather than avoided altogether
Results & Testimony
"PQNK does not oppose Eucalyptus. PQNK opposes planting any species without restoring the soil ecosystem first." Restore soil life, and the plant regulates itself.
Related Knowledge Papers
The full science and field data behind agroforestry under PQNK.