What Is Anhydrous Ammonia?

Anhydrous ammonia (NH3) is a compressed liquid gas containing 82% nitrogen by weight — the highest nitrogen concentration of any fertilizer. It is injected directly into soil at 6–8 inches depth where it reacts with soil moisture and binds to soil particles. It is the lowest cost-per-pound nitrogen source but requires specialized pressurized equipment and OSHA hazmat training.

Key Facts About Anhydrous Ammonia

82% nitrogen by weight — highest concentration of any nitrogen fertilizer
Stored and transported under pressure as a liquid at -28°F or 150–200 psi at ambient temperature
Applied via toolbar injection at 6–8 inch depth using nurse tank and knife applicator
Requires OSHA training and respiratory protection; liquid contact causes severe burns
Most cost-effective nitrogen per pound of N when applied correctly in fall or spring

Anhydrous Ammonia vs. Other Nitrogen Sources

Product	% N	2026 Cost/lb N
Anhydrous ammonia	82%	$0.49–$0.60/lb N
Urea	46%	$0.52–$0.65/lb N
UAN 32%	32%	$0.50–$0.64/lb N
Ammonium sulfate	21%	$0.81–$0.96/lb N

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What Is Anhydrous Ammonia? | Fertilizer Guide

Key Facts About Anhydrous Ammonia

Anhydrous Ammonia vs. Other Nitrogen Sources

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