[Above Image] James Hermans at the Pacific Symposium in San Diego in October, 2025.
Field | Dose | Placement.
After two decades in magnet design and countless conversations about polarity, the phrase Field | Dose | Placement captures the real science better than any slogan ever could.
Because when you even look at the plant literature, where placebo doesn’t exist, the story becomes very clear:
The Biology responds to magnetic fields.
But not in the way Davis & Rawls described.
The Origin of the North–South Narrative
In the 1970s, Albert Roy Davis and Walter Rawls popularised the idea that:
- The north pole provides one biological “energy.”
- The south pole provides an opposite biological “energy.”
- Each pole produces distinct physiological effects.
That framing spread widely through books, patents, and later through William Philpott and others.
The problem
It reframed magnetism in energetic language divorced from physics.
As detailed in our review of their work
- Magnetic fields are vector fields.
- Field lines form continuous loops.
- Energy density depends on B², not pole sign.
- The Bloch wall does not create separate biological energies.
The polarity doctrine became influential, but not based on any credible science.
Plants: The Placebo-Free Test
If north and south poles truly had fundamentally different biological effects, plants should show it clearly.
But what does the serious literature show?
Example 1: Wheat Growth Study (2024/2025)
A recent PubMed-indexed study (PMID: 40923284) reported:
- Increased wheat growth under static magnetic field exposure.
- Increased root number and root length.
- Effects were field-strength dependent.
- Effects occurred regardless of magnetic field polarity.
That sentence alone is important.
Polarity was not the determining factor.
Field strength was.
Example 2: Sunflower Seeds – Vashisth et al.
In a Bioelectromagnetics study, sunflower seeds exposed to a 200 mT static field for 2 hours demonstrated:
- Increased growth metrics
- Increased chlorophyll
- Increased yield parameters
Again:
Measured variable → field strength + exposure time.
Not pole identity.
Example 3: Cakmak et al. (Wheat & Bean)
Static magnetic field exposure (4 mT and 7 mT):
- Improved germination under osmotic stress.
- Accelerated early growth.
- Dose-dependent effects.
No polarity distinction.
Example 4: Podleśny (Broad Bean)
Magnetic seed treatment studies focus on:
- Flux density
- Exposure duration
- Germination and yield outcomes
Again, no robust pole separation framework.
Example 5: Maffei Review
Maffei’s review of magnetic field effects in plants highlights:
- Variable results
- Need for replication
- Possible mechanisms (ROS, ion flux, radical pair interactions)
- Complexity of responses
But no strong north-vs-south biological dichotomy.
Why Gradient Matters More Than Pole
Here is the physics distinction that rarely gets explained clearly.
A permanent magnet produces:
- Field strength (|B|)
- Spatial distribution
- Field gradient (∇B)
A uniform field applies torque but no translational magnetic force.
A gradient field produces spatial force:
F = ∇(m · B)
Biological tissues are heterogeneous.
Roots, membranes, ion channels, cytoskeleton structures, all operate in spatially organised environments.
A changing magnetic field across space (gradient) is biologically more plausible as a variable than “north energy vs south energy.”
And crucially:
You can create strong gradients using either pole.
Which makes polarity a crude and confounded proxy for geometry.
The Human Parallel
The same confusion that affected crop research affected human magnetic therapy.
Polarity folklore overshadowed:
- Field intensity
- Exposure duration
- Placement precision
- Gradient distribution
Controlled clinical investigations rarely show reproducible north–south separation.
But field strength differences do produce measurable physiological changes in some contexts.
“The lesson from plants reinforces the lesson in humans”:
The variable that matters is not which end of the magnet you label.
It is the field configuration delivered to the biological target.
Field | Dose | Placement
This is the framework that aligns with both plant science and human magnetobiology.
Field
- Strength at target
- Spatial geometry
- Gradient profile
Dose
- Exposure time
- Repetition
- Timing relative to biological stage
Placement
- Where relative to root, meristem, nerve pathway, or injury site
- Distance from target tissue
- Orientation relative to biological axis
That is where repeatable outcomes live.
Closing Thought
Plants don’t believe in north poles.
They respond to physics.
And the physics says:
It’s not the pole.
References:
1. Maffei ME. Magnetic field effects on plant growth, development, and evolution. Front Plant Sci. 2014 Sep 4;5:445. doi:10.3389/fpls.2014.00445. PMID: 25237317. Available from: https://pubmed.ncbi.nlm.nih.gov/25237317/
2. Vashisth A, Nagarajan S. Effect of magnetic field on germination and early growth characteristics in sunflower (Helianthus annuus L.) seeds. Bioelectromagnetics. 2008;29(7):571–578. PMID: 19681058. Available from: https://pubmed.ncbi.nlm.nih.gov/19681058/
3. Cakmak T, Dumlupinar R, Erdal S. Acceleration of germination and early growth of wheat and bean seedlings grown under various magnetic field and osmotic stress conditions. Bioelectromagnetics. 2010;31(2):120–129.
4. Podleśny J, Pietruszewski S, Podleśna A. Efficiency of magnetic treatment of broad bean seeds cultivated under experimental plot conditions. Int Agrophys. 2004;18:65–71. https://www.international-agrophysics.org/Efficiency-of-the-magnetic-treatment-of-broad-bean-seeds-ncultivated-under-experimental,106680,0,2.html
5. Galland P, Pazur A. Magnetoreception in plants. J Plant Res. 2005;118(6):371–389.
6. Maffei ME. Magnetic field effects on plant physiology and radical pair mechanisms (review). Front Plant Sci. 2014;5:445. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC4154392/
