In-Furrow
Everything a root
meets first happens
in two inches.
Feeding biology, supporting roots, unlocking early nutrient efficiency. In-furrow is the only pass where you place biology, carbon and nutrition in the exact volume of soil the first roots will occupy.
The opportunity
Four inches decide the next four months.
A root does not search widely in its first three weeks. It works the soil directly beneath the seed, and it takes whatever is already there. In-furrow extends seed treatment biology out into the soil where roots actually explore.
Surface and closure
Residue, crust and sidewall compaction. Good closure keeps a dry May from cooking the biology you just applied.
Seed and starter
The seed, the liquid stream and the first radicle occupy the same cubic inches. This is where an in-furrow program earns its place, and where salt injury happens if the chemistry is wrong.
Nodal root zone
By V2 the crop switches to nodal roots. Carbon and biology placed at planting have already moved into this band with moisture.
Moisture and reserve fertility
Deeper roots reach banked nutrients only if early growth was strong enough to build the structure to get there.
2025 field trial
What the data showed.
Independent metagenomic sequencing, Haney soil chemistry and plant tissue analysis tracked the AgriBio in-furrow program from V2 through V8 on commercial corn.
+78.7
Percentile point increase in microbial diversity
At V2, early establishment
−16.3
Percentile point reduction in denitrification potential
At V2, less gaseous nitrogen loss
+11.0%
Tissue nitrogen increase by V8
Progressive: +5.1% at V2, +7.2% at V5, +11.0% at V8
+22.1%
Increase in soil calcium availability
At V5, the only significant soil chemistry change
+32.7%
Tissue potassium increase
At V5, soil to plant correlation r = 0.875
+34.4
Percentile point increase in calcium transport potential
At V2, corresponded with +33.3% tissue calcium
Trial design: shotgun metagenomic sequencing, Haney soil chemistry and tissue nutrient analysis. Reese Farm, Findlay, Ohio. Sampled at V2, V5 and V8. Prepared by RhizeBio, Inc.
Critical timing
The first 7 to 21 days set the ceiling.
Root architecture, nutrient efficiency, biological dominance, stress tolerance and your yield potential ceiling are all established in the weeks immediately after planting.
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Root architecture
Primary root structure and lateral branching patterns are locked in early.
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Nutrient efficiency
Early biological activity determines how well the crop accesses everything else you apply.
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Biological dominance
Beneficial populations established first hold off pathogenic pressure longer.
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Yield ceiling
Maximum yield potential is largely set before the crop even emerges.
Featured products
Biology and energy, placed where roots live first.
Three products that populate the root zone and feed both halves of the microbial equation, plus one ocean derived carbon source chosen based on what the field needs.
Concentrated liquid biology
BioMax® E
Extracted from premium vermicompost, BioMax E delivers beneficial microorganisms directly into the root zone. It rapidly populates the rhizosphere with living biology, supports nutrient retention and improves soil structure from the moment it is applied.
- Promotes microbial biodiversity and soil balance
- Enhances nutrient uptake and retention
- Improves water holding capacity and root zone efficiency
- Supports resilience under early season stress
3 to 5 gal per acre, in-furrow
Product details
Bacterial support
DualStart® B
A concentrated blend of microbial supporting carbon sources, minerals and plant derived compounds that stimulate soil bacteria. B drives the nutrient conversion side of the rhizosphere.
- Stimulates beneficial bacterial growth
- Improves nutrient mineralization and recycling
- Converts nutrients into plant accessible forms
16 to 32 oz per acre, in-furrow
Product details
Fungal support
DualStart® F
Nourishes fungi with kelp extracts and humic substances. F builds the structure, hydration and nutrient flow side that bacteria alone cannot deliver.
- Supports fungal populations in the rhizosphere
- Enhances root zone hydration and water uptake
- Encourages stable soil aggregation and structure
16 to 32 oz per acre, in-furrow
Product detailsOne slot, two options
Squid Juice or SeaPhos.
Two different products, one spot in the program, at the same rate. Run either one on its own or split it half and half. Both deliver ocean derived carbon and biology into the root zone during the most critical window of crop establishment.
Why chitin matters
Chitin is a structural polysaccharide found in fungal cell walls and insect exoskeletons. Applied in-furrow, it stimulates populations of chitin degrading bacteria, primarily actinomycetes and Bacillus species, which are also among the most effective natural suppressors of soil borne fungal pathogens. The result is a more biologically competitive root zone from day one, without adding a fungicide.
Green Flow Corp
Squid Juice
A low heat squid hydrolysate delivering chitin, amino acids, fats and a balanced 2-2-2 analysis that activates chitin degrading biology in the root zone. Usable from germination through harvest.
- Delivers chitin to activate chitin degrading microbial populations
- Stimulates bacteria that naturally suppress soil borne fungal pathogens
- Free amino acids and organic carbon as immediate microbial energy
- Supports induced systemic resistance in the young plant
16 to 32 oz per acre, in-furrow
Product details
Pacific Gro
SeaPhos
Plant available phosphorus paired with carbon based energy to fuel early root metabolism and microbial activity at the same time. Bridges the gap between nutrient supply and biological demand in cold or tight soils.
- Supplies plant available phosphorus during the most demanding phase of establishment
- Carbon carrier fuels root metabolism and microbial activity together
- Particularly effective in cold soils where phosphorus tie up limits early availability
16 to 32 oz per acre, in-furrow
Product details
How they work together
One system. Complete biology.
Each product plays a distinct role. Combined, they create a biologically active, nutrient efficient root environment from day one.
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Bacterial and fungal balance
DualStart B and F establish and support both populations, bacteria and fungi working in concert to drive nutrient cycles and soil structure.
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Rapid microbial diversity
BioMax E increases microbial activity and species diversity, amplifying the biological foundation DualStart laid down.
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Chitin, carbon and phosphorus
Squid Juice floods the root zone with chitin, activating disease suppressing bacteria and fueling the system with amino acids and carbon. SeaPhos fills the same slot where phosphorus availability is the limiting factor, and the two split cleanly if you want both.
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The complete root zone
Together they deliver a biologically active, nutrient efficient root environment before the crop shows above ground.
Key takeaway
Place biology and energy where roots will live first.
The in-furrow window does not get a second chance. What goes in that furrow determines what the crop has to work with for the rest of the season. Send us your planter setup, the pump, the tips and the water you are running, and we will build a program that mixes clean on your equipment.