Rhyzogreen comes in 80-gallon, 135-gallon and 270-gallon totes. You'll need approximately 1 gallon for every 5 acres.

Typically, you'll need 1/5 of a gallon per acre; another way to look at that is 1 gallon for every 5 acres. Consult the product label or your Rhyzogreen® rep for more specific details. 

Blend recommended amounts of Rhyzogreen® with 5-25 gallons of water per acre for foliar application or a minimum of 2 gallons of water per acre for in-furrow application. For best results, foliar applications should be made in the morning hours when the air is cool.

Alfalfa - 1 gallon per 5 acres. Foliar - Early spring after greenup and between cuttings after plants have started showing a minimum of 2"-3" of regrowth.
Grazing Pastures - 1 gallon per 5 acres. Foliar - Early spring after greenup. For best performance repeat application every 90 days during active growing season.
Small Grain - 1 gallon per 5 acres. Foliar - No earlier than 3 leaf stage.
Corn & Sunflowers - 1 gallon per 5 acres. In-furrow or foliar - No earlier than 3 leaf stage.
Potatoes - 1 gallon per 5 acres. In-furrow or foliar twice a year.
Soybeans - 1 gallon per 5 acres. In-furrow or foliar - No earlier than second trifoliate stage.

Yard Grass Receiving Continuous Mowing - 2 gallons per 5 acres. Foliar - Early spring after greenup. For best performance repeat application every 30 days during active growing season.
Vegetables - 2 gallons per 5 acres. Foliar - At 20 to 30-day intervals throughout growing season. For hand spraying mix 2-4 oz per gallon of water.
Fruit Trees - 2 gallons per 5 acres. Foliar - 3 times per crop cycle - Before flowering, early fruit stage and mid fruit stage.