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Agri-Hume® Spar K

Liquid potassium acetate fertilizer with humic acid

The Agri-Hume® product line offers liquid nutrient formulations with a built-in humic acid component. This combination helps complex soil nutrients to improve plant availability and helps improve soil tilth and structure. Agri-Hume® products enhance nutrient uptake, stimulate root development, improve water holding capacity and maximize nutrient availability. Agri-Hume®offers a wide range of benefits at a reasonable cost.

Agri-Hume® Spar K is a potassium acetate fertilizer that contains humic acid to increase microbial activity in the soil. Potassium acetate is a premium source of potassium and is the most plant-available form. It has a lower salt content than other potassium fertilizer forms, including potassium thiosulfate. Agri-Hume® Spar K facilitates potassium absorption without damaging the soil or plant tissue and contains Mar Vista Resources’ innovative Nutri-Drive® technology to increase plant uptake and nutrient mobility in the plant.

  • Contains 30% soluble potash and 0.4% humic acid derived from leonardite
  • Plant-available potassium source for efficient uptake
  • 3.55 pounds of soluble potash (K2O) per gallon
  • Chloride- and sodium-free
  • High potassium analysis

Packaging Options
Available in 2.5-gallon jugs and 275-gallon totes.

Product Type
Crop Nutrition Icon
Crop Nutrition
Enhanced Products Icon
Enhanced Products
Application Type
Soil Icon
Foliar Icon
Fertigation Icon
Product Line
BlueTerra Icon
Potassium Icon

Application Details

Agri-Hume® Spar K may be applied pre-plant, as a starter, side-dressed, fertigated, top-dressed or banded to the soil. It may also be used as a pop-up or in-furrow at a rate of 1/4 to 1 gallon per acre. Agri-Hume® Spar K can also be applied via a dilute foliar spray from the air or ground.

Nutrient Function

Potassium Icon
Potassium is critical for cell wall water balance regulation and sugar production and transportation within the plant. Adequate potassium levels support pest and disease tolerance by enhancing stem strength.
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