Carb-Amp 21 21-0-0 6.8% S

Carb-Amp 21 (21-0-0. 6.8% S) is a stabilized, high-efficiency nitrogen formulated with complex carbohydrates and nutrient efficiency polymers, designed to stabilize nitrogen against volatilization loss while increasing plant availability of many soil solution macro and micro nutrients.  It has synergistic impacts with residual fertilizers and soil nutrients due to its capability to solubilize and liberate nutrients bound to the soil colloid and render them plant avaliable.

Carb-Amp is produced in a state-of-the-art controlled-reaction facility.

Carb-Amp contains optimal ratios of carbon bonds, oxygen, hydrogen and stabilized sulfuric acid, allowing it to perform in a wider range of soil and water pH conditions compared to most other nitrogen and sulfur products. It is not adversely impacted by voilatilization due to it's highly-stable molecular structure.

Carb-Amp is stable in irrigation water and releases in the soil solution working to mitigate impacts of alkilinity, bi-carbonate and sodium contamination.

Carb-Amp's molecular structure facilitates highly efficient conversion of N to the ammonium form (NH+4) and then holds it in that phase longer, minimizing loss to volatilization and leaching. Ammonium metabolism requires oxygen and biological activity from nitrosomonas. Carb-Amp contains the fuels driving this process. Carb-Amp is highly efficient as it optimizes these energy consuming processes by providing NH4+ and O2 which are required during assimilation of N through the root system.

Carb-Amp releases hydrogen ions (H+) which reduce pH around the root system. Under most conditions, specifically elevated pH and bicarbonate, Carb-Amp will enhance nitrogen, phosphorous and cation uptake (Ca2+, Mg2+, K+, Fe3+, Mn2+) via synergistic delivery of Nitrogen along with Carbonn, Oxygen, Sulfate, Hydrogen, Carbohydrate and Nutrient Efficiency Polymers.

Carb-Amp is an efficient, complete and self-regulating formula.

Carb-Amp further enhances nutrient availability by positively impacting oxidation reduction potential. The beneficial (ORP/REDOX) properties of Carb-Amp work to transform minerals into their optimized plant available forms.

Carb-Amp delivers the optimal formulation. Simple mixtures of urea, sulfur, and carbohydrate will not deliver the same performance as they do not contain the optimal, synergistic ratios of the key elements. This precise controlled reaction formulation does!


Gal/Acre  Lbs. N/1,000 Ft2 Lbs. N/Acre
0.50 0.028 1.239
1.00 0.057 2.478
2.00 0.114 4.956
5.00 0.285 12.39
10.00 0.570 24.78


Carb-Amp 21 produced by Custom Agronomics

Unique, Highly Stable and Efficient

  • 21% Stabilized Urea Nitrogen
  • Sulfuric Acid equivalent to reduce bicarbonates and sodium
  • Carbon to optimize C:N ratios
  • Hydrogen to reduce alkalinity
  • Oxygen to enhance aerobic soil functions and drive ammonuim metabolism
  • Sulfur for plant uptake
  • ORP activity driving redox to maintain and convert minerals to plant available forms
  • Carbohydrates to support aerobic soil microbiology
  • Nutrient Efficiency Polymers to maintain optimal nutreint availability


Use Rate

Carb-Amp is typically applied as 1/4 to 3/4 of the toatl nitrogen recommendadtion.  Apply as a fertigation injection or as a spray application.. Apply in a minimum of 50 gallons of water per acre. Lightly watering in the application is recommended if possible.

Carb-Amp is a low pH product and will not tank mix with certain other inputs. A jar test is recommended before use.  Do nopt apply near water, storm drains, or drainage ditches.  Do not apply if heavy rain is expected. Apply this product only to your turf and landscape.  A balanced Nitrogen program utilizing Urea, Ammoniacal and Nitrate forms, best suited for your specific application is advised. Always consult your soil tests when programming your nitrogen budget.

Case Size

2 x 2.5 gallons

30 gallon drum

55 gallon drum

250 gallon tote

Use Rate

Carb-Amp 21 Specimen Label pdf

Carb-Amp 21 SDS pdf