Bio-Extend Planter box seed treatment for corn

Q: How does the Azospirillum in Bio-Extend help corn?

Azospirillum brasilense colonizes the corn root zone and fixes atmospheric nitrogen into a plant-available form. It provides a supplemental nitrogen source that works alongside your fertility program.

Q: Is there a Bio-Extend for soybeans?

Yes. Bio-Extend for soybeans uses Bradyrhizobium japonicum, the nitrogen-fixing bacteria that nodulate soybean roots.

Q: Where can I buy Bio-Extend?

Bio-Extend is sold through TerraMax dealers. Use the dealer locator at terramaxag.com/where-to-buy/ or contact TerraMax for pricing.

Smooth-flowing seed, nitrogen-fixing Azospirillum, and three micronutrients in one planter box treatment.

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Bio-Extend planter box seed treatment for corn, illustrated ear of corn

Three jobs, one planter box treatment

Bio-Extend helps seed move cleanly through the planter, then gives each seed a biological and nutritional head start in the furrow.

Seed that flows

Seed fluency agents

Bio-Extend coats seed for smooth, uniform flow through your existing planter. That means more consistent seed handling and even coverage at planting.

Nitrogen-fixing biology

Azospirillum brasilense

Azospirillum brasilense is a nitrogen-fixing bacterium that colonizes the corn root zone. It converts nitrogen from the air into a form the plant can use, giving your crop a supplemental nitrogen source alongside your fertility program.

Micronutrients at the seed

Three essential micronutrients

Fe (iron)
Mn (manganese)
Cu (copper)

Iron, manganese and copper support the enzyme activity and metabolic processes young corn plants depend on.

Early emergence, side by side

Early-season corn emergence comparison: untreated check rows on the left and Bio-Extend treated rows on the right — Early-season emergence. Untreated check (left) and Bio-Extend (right).

Corn ears from a North Dakota plot: three untreated check ears on the left and three Bio-Extend treated ears on the right — Ears pulled from a North Dakota plot. Untreated check (left) and Bio-Extend (right).

Built for a stronger start

Enhances early root development and emergence
Supports nitrogen efficiency through the season
Improves seed handling and planting consistency

Bio-Extend for corn: product details

Guaranteed analysis

Iron (Fe)	0.37%
Manganese (Mn)	0.33%
Copper (Cu)	0.08%
Azospirillum brasilense	1 × 10⁵ CFU/g

Application

Crop	Corn
Method	Planter box
Rate	3 oz per unit (80,000 kernels)
Package treats	50 units of seed

Bio-Extend for corn: common questions

What is Bio-Extend for corn?

Bio-Extend is a planter box seed treatment for corn from TerraMax. It combines seed fluency agents for smooth seed flow, the nitrogen-fixing bacterium Azospirillum brasilense, and three micronutrients: iron, manganese and copper.

How does the Azospirillum in Bio-Extend help corn?

Azospirillum brasilense colonizes the corn root zone and fixes atmospheric nitrogen into a plant-available form. It provides a supplemental nitrogen source that works alongside your fertility program.

Which micronutrients are in Bio-Extend for corn?

Iron (0.37%), manganese (0.33%) and copper (0.08%).

How is Bio-Extend applied?

Add 3 oz of Bio-Extend per unit of seed (80,000 kernels) in the planter box at planting. One package treats 50 units. Follow label directions for mixing.

Is there a Bio-Extend for soybeans?

Yes. Bio-Extend for soybeans uses Bradyrhizobium japonicum, the nitrogen-fixing bacteria that nodulate soybean roots.

Where can I buy Bio-Extend?

Bio-Extend is sold through TerraMax dealers. Find a Bio-Extend dealer near you or fill out the form below and our team will follow up with pricing.

Planning corn acres for next season?

Tell us your acres and location. We'll send Bio-Extend pricing and connect you with your local TerraMax rep.

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Bio-Extend Planter box seed treatment for corn