Soil Biology-to NPK or not

Plants don’t actually “absorb” minerals.

Microbes do the work.

Mycorrhizal fungi extend root systems.

Bacteria solubilize phosphorus.

Organic acids chelate iron, zinc, calcium.

Up to ~80% of plant nutrient uptake is microbially mediated.

So, when biology collapses, inputs rise.

When biology returns, inputs fall.

That’s why we build habitat — not fertiliser.

This is why I conduct soil testing not simply to justify the application of additional fertilizers, but to determine effective strategies for enabling soils to release nutrients already present.

Years ago, someone advised adding specific amendments to "unlock" soil potential, although their recommendations were not entirely clear to me at the time.

Through extensive experience with this approach, its benefits have become evident, often surpassing results achieved by introducing regular fertilisers that may cause long-term harm. A significant concern is that repeated crop and grass cultivation and applied nutrition, has led to systems resembling hydroponics, resulting in minimal root-soil interactions. This effect is clearly illustrated in a recent photograph.

I've marked the differences in the health of the grass field

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The central area of the field displays a lime green hue (with no colour adjustments I hasten to add), indicating that the grass is under significant stress. This can be attributed to recent persistent downpours and elevated water levels. In contrast, the headlands exhibit vibrant growth and healthy colouration, reflecting the positive influence of robust soil biology, which tolerates heavy rainfall while maintaining photosynthesis and promoting plant growth.

Additionally, the soil in these areas is more friable and contains greater pore volume. The cultivated grass at the centre lacks beneficial biological associations and relies primarily on consistent nitrogen supplementation.

When I take samples i use best practice and aggregate the soils to get a true representation for that field, as well as digging a soil pit to investigate the soil profile and rooting zone and the afore mentioned biology in the form of root exudates.

Collected soil samples are sent to the US for comprehensive analysis at the Logan Labs, including both major and trace elements. Initial attention is given to the calcium-to-magnesium ratio, which should ideally be around 7:1 to support optimal soil function.

If the soil structure is overly compacted, calcium application may be necessary; conversely, when calcium is abundant, magnesium supplementation is recommended. Subsequent assessment of other elemental concentrations helps determine further corrective amendments. Restoration of optimal soil health is a gradual process, with improved grass and forage growth becoming evident over time.

In the meantime to ensure good livestock production then I can prescribe a mineral package with seaweed for additional bioavailability for free access feeding this can be in the form of minerals or molasses licks.

I also look at the soil regarding pH and how its functioning and if soil organic matter needs improving I will suggest a mix for grass for grazing or cutting, herbal leys or diverse species mix as well as management strategies in order to improve soil health. I source seeds from an International breeder and can do a really good deal.

A great biological stimulant to provide amino acid directly to the plant, which encourages plant growth, root development and yield response.

Services Offered:

• Soil Management Plans

• Standard or Albrecht Soil Tests

• Grass or Cover Crop Seeds from Oliver Seeds

• Specified Seaweed Minerals or Licks or off the shelf

• Bokashi Actiferm

• Bio Stimulant Amino Acids