SoilBoost EA: What the Field Trial and Research Actually Show
SoilBoost EA: What the Field Trial and Research Actually Show
SoilBoost EA is a leonardite-derived humic acid soil conditioner. In a Philippine registration field trial (FPA Experimental Use Permit No. 3227) on banana, run by an FPA-accredited researcher, it produced taller plants with more leaves and improved the soil's water-holding capacity to 88.7 percent versus 80.0 percent in the untreated control, with all measured differences statistically significant at p less than 0.01. Two peer-reviewed meta-analyses covering hundreds of studies report humic acid amendment lifts crop yield by about 12 percent and nitrogen use efficiency by about 27 percent on average. This page sets out the evidence, the trial method, and how the product works, so you can judge it on the data.
Published 2 September 2026. Last reviewed 2 September 2026. SoilBoost EA is produced exclusively for Chemiseed Sdn. Bhd. and Kudzu Seeds Trading, independent sister companies.
What did the field trial find?
SoilBoost EA was evaluated in a bioefficacy trial commissioned by Kudzu Seeds Trading for Philippine product registration under the Fertilizer and Pesticide Authority (FPA Experimental Use Permit No. 3227). The trial was a randomized complete block design (6 treatments, 3 replications) run by an FPA-accredited researcher at the PCA-Davao Research Center on tissue-cultured Lacatan banana seedlings, and was certified as following Good Agricultural Practices. It is a registration trial held by us rather than a published independent study, and we label it accordingly in our Evidence Hub.
| Measured outcome (3 months after application) | Finding |
|---|---|
| Plant growth vs unfertilized control | Taller seedlings, greater girth, and more leaves (significant at p less than 0.01) |
| Strongest overall growth | Balanced fertilizer program combined with SoilBoost EA, confirming its role as a soil conditioner that helps fertilizer work harder, not a fertilizer replacement |
| Soil chemistry | Raised soil organic matter, available phosphorus and potassium, and lifted soil pH |
| Water-holding capacity | 88.7 percent versus 80.0 percent in the untreated control, with soil drying out more slowly |
A summary of this FPA trial is available on request, and the full data tables with our evidence-labelling method are in the Evidence Hub.
What does the wider research show?
The trial result is consistent with the broader peer-reviewed literature on humic acid soil conditioners. These meta-analyses are about humic acid as a class, not about SoilBoost EA specifically.
| Source | Finding (meta-analytic averages) |
|---|---|
| Ma et al. 2024, Agronomy (MDPI): humic acid meta-analysis | About +12 percent crop yield, +27 percent nitrogen use efficiency, and +17 percent nitrogen uptake across multiple crops and environments |
| Rose et al. 2014, Advances in Agronomy (Vol. 124) | About +22 percent shoot dry weight and +21 percent root dry weight across hundreds of studies, with stronger responses (around +28 percent) under stress conditions |
Responses are strongest in soils with moderate pH (6 to 8), annual rainfall above 300 mm, and low baseline nitrogen, conditions typical of tropical plantation agriculture.
How does SoilBoost EA work?
Nutrient chelation
Humic and fulvic molecules form stable, water-soluble complexes with iron, zinc, copper, and other micronutrients, keeping them available to roots rather than precipitating in the soil.
Cation exchange capacity
Humic acid raises the soil's CEC, so potassium, calcium, magnesium, and ammonium resist leaching during heavy tropical rainfall.
Root nutrient signalling
Humic substances are associated with upregulation of nitrate-uptake activity in roots, improving how efficiently applied nitrogen is absorbed.
Organo-mineral complexation
Humic molecules bind with soil minerals and protect labile carbon from rapid breakdown, building longer-term soil structure and fertility.
What is in it?
| Property | Value |
|---|---|
| Source material | 100 percent leonardite ore, the richest natural source of humic and fulvic substances |
| Humic and fulvic content | Leonardite-derived, lab-verified (qualitative) |
| pH | 3.84 (acidic concentrate) |
| Sulphur | Approximately 0.45 percent |
| Micronutrients | Chelated iron, zinc, and copper |
Work out the quantity for your block, crop, and application method with the free SoilBoost EA application rate calculator, or see the SoilBoost EA product page for pack sizes.
Frequently asked questions
Is SoilBoost EA a fertilizer?
No. It is a soil conditioner. It improves how the soil holds and releases nutrients rather than supplying NPK itself, and works best alongside a balanced fertilizer program.
Who ran the trial?
The trial was commissioned by Kudzu Seeds Trading for Philippine product registration and run by an FPA-accredited researcher at the PCA-Davao Research Center under FPA Experimental Use Permit No. 3227, following Good Agricultural Practices. It is a registration trial held by us, not a published independent study, and we label it that way in our Evidence Hub.
Who makes SoilBoost EA?
SoilBoost EA is produced exclusively for Chemiseed Sdn. Bhd. and Kudzu Seeds Trading, independent sister companies. Kudzu Seeds Trading supplies it in the Philippines and its export markets.
Which crops is it for?
Tropical plantation and tree crops including oil palm, rubber, coconut, cacao, durian, and banana, used alongside a balanced fertilizer program.
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