Preparation
• Prepare stock solution; use warm water to get the feric-citrate into solution.
• Make 10 liters of full-strength plant culture solution as follows.
• To 5 liters of water, add 5 ml of each stock solution and mix.
• Dilute to 10 liters by adding another 5 liters of water.
• Adjust pH to 6.6 – 6.8 with 1 N NaOH