Boron and Manganese Solution.
Dissolve 3 teaspoons of powdered boric acid and 1 teaspoon of chemically pure manganese chloride (MnCl2• 4H20) in
a gallon of water. (Manganese sulfate could be substituted for the chloride.)
Dilute 1 part of this solution with 2 parts of water, by volume. Use 1 pint of the diluted solution for each 25 gallons of
nutrient solution