Technical Analysis
Composition data. Not marketing claims.
When fertiliser costs have tripled and supply is failing, growers and agronomists need to know exactly what they are putting in the soil and why it works. Humic substance spectrum, formation characteristics, product specifications, and what the numbers mean for root-zone performance in a season where every kilogram of input matters.
The spectrum
Humic substances are not one thing.
They are a family of organic compounds with different molecular weights, solubility profiles, and functional roles. Knowing where a product sits on this spectrum matters more than the name on the bag.
Leonardite
Raw mined material. Oxidised lignite or peat deposits formed over geological timescales. Most commercial humate products start here and require chemical extraction to isolate active compounds.
Humate Products
Processed or raw materials containing humic substances. Quality varies widely by source material, extraction method, and concentration of active compounds. Not all humates deliver the same root-zone performance.
Humic Acid
Higher molecular weight fraction. Stays in the soil matrix. Designed to help increase cation exchange capacity (CEC), supports soil structure, and acts as a longer-term nutrient reservoir. Insoluble below pH 2.
Fulvic Acid
Lowest molecular weight in the humic spectrum. Soluble across the full pH range. Chelates minerals to support bioavailability and nutrient transport through cell membranes. Suited to fertigation and foliar application.
The Black Stuff contains both humic and fulvic acid fractions alongside organic matter. In practice, this means the material is designed to help support both soil conditioning and plant-available nutrient retention.
Composition
What is in the material.
Key characteristics from the Lynch's Crater volcanic peat source. No chemical extraction. No potassium hydroxide processing. And critically — no import dependency. This product exists in Australia, on Australian soil, when 91% of the nation's fertiliser does not.
Source
Lynch's Crater volcanic peat, North Queensland
Formation
~230,000 years under anaerobic lake conditions
Extraction
No chemical processing (no KOH)
Active Components
Humic acid, fulvic acid, organic matter
Moisture Holding
Supports up to 20x its weight in water
Persistence
Evidence suggests activity up to 5 years post-application
Product forms
Formats and pricing.
Two formats. One for broadacre cost pressure, one for trial plots and smaller operations. Both are the same source material.
1m³ Bulk Bag
Broadacre, commercial, and large-scale programs
$990.00
- --Granular spreading
- --Banding at planting
- --Blending with existing fertiliser
20L Pail
Horticulture, trial evaluation, and smaller operations
$59.95
- --Hand application and garden beds
- --Fertigation (liquid extract)
- --Trial plots and field results evaluation
Documentation
Technical documents. Available on request.
We share detailed composition data, laboratory analysis, and application guidance with agronomists, distributors, and growers evaluating the product for their programs. Ask and we will send it.
Product Technical Sheet
Composition, application rates, compatibility guidance, and what the data means in practice.
Full Laboratory Analysis
Humic acid, fulvic acid, organic matter, and trace element composition from independent analysis.
Application Guidelines
Crop-specific rates, application methods, and guidance on integrating with existing fertiliser programs.
Need the numbers?
Request the technical documentation.
Winter cropping starts in weeks. Fertiliser supply is not recovering. Tell us your crop and program — we will send you the composition data, trial data, and application guidance you need to make an informed decision before planting.