~12.5 Mt
of sulfur a year: the global deficit. Agriculture receives less than half of what it needs1
Biological sulfur fertilizer
Sulfurthat worksin the soil
Unlocks the soil, unleashes the harvest. Scroll to follow one BioSera granule from lump sulfur to sulfate at the roots of wheat.
Scroll
01Raw material
One granule out of thousands
BioSera starts with technical sulfur, a by-product of oil and gas refining in Kazakhstan. In its raw form it barely dissolves, and plants cannot absorb it.
S₈elemental sulfur molecule: eight atoms in a ring
02Milling
The finer, the faster
Sulfur is milled down to micron-sized particles. The surface area grows tens of times over, giving bacteria plenty to hold on to.
mm → µmparticle size before and after milling
03Bentonite
Clay that opens up the granule
Sulfur microparticles are pressed together with bentonite clay. In moist soil the bentonite swells, and the granule breaks into thousands of particles right in the root zone.
90 / 10sulfur and bentonite; ratio from 80/20 to 90/10 as required
04Bacteria
The living part of BioSera
Our own strain of sulfur-oxidizing Thiobacillus bacteria is applied to each granule. They activate with the first moisture and convert sulfur into sulfate, the form roots absorb. Without them, oxidation in soil takes months.
S⁰ → SO₄²⁻bacterial oxidation of sulfur
05Soil
Nutrition at the roots
Water reaches the granule, the bentonite swells, and the particles disperse through the soil. The sulfuric acid that forms gently acidifies the root zone and releases phosphorus locked up by calcium.
−1…2 pHphosphorus, iron, zinc and manganese become available to roots again
06Harvest
A harvest you can see
Plants need sulfur to build protein and oil, and unlocked phosphorus boosts the NPK you already apply. The effect lasts 2–3 seasons, with yield gains of 10–30%.
- Sulfur
- 80–90%
- Bentonite
- 10–20%
- Bacteria
- up to 1%
- Granule
- 2–6 mm
- Rate
- 150–650 kg/ha
- Effect
- 2–3 seasons