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The Importance of Magnesium for Great Lemons, Limes, Kumquats, Calamondins, and Oranges.

Mani Skaria, Ph.D.

Introduction.

Magnesium is needed in human body for more than 300 biochemical reactions. It is required for normal nerve and muscle function, for better immune system, for better bones, and to regulate blood glucose level. Like calcium, and potassium, magnesium is an electrolyte in our body.

The figure at the right is the symbol of Magnesium, as per the periodic table. Mg = Magnesium, 12 is the atomic number (number of protons), and 24.305 is the relative atomic mass (protons + neutrons). Magnesium has many physiological functions in citrus plants. It plays a major role in photosynthesis, enzyme activation, and energy synthesis.

A basic difference between plants and animals

Animals can move. Plants are sedentary.

When a physician advises on protein deficiency, the patient takes the information and make corrective measures for themselves and even for their dependents, including the pets. People and animals can move around Whereas, most plant owners are not plant doctors; they have no clue that that plant needs food and water. As a plant doctor, I consider it an unforgivable sin.

Why Citrus plants need Magnesium Top eight reasons

  • Chlorophyll production
  • Protein production
  • For better fruit yield and fruit weight
  • For better juice content
  • Better Vitamin C content
  • Balanced juice acidity
  • Increased sugar content
  • To reduce fruit cracking

How much Magnesium is needed?

About 200 milligram per tree Magnesium accounts for higher fruit production.

How do I know my citrus plant is suffering from Magnesium deficiency?

  1. Yellowish green blotching near the base of the leaf, between the midrib and outer edge
  2. With severe deficiency, the entire leaf becomes yellow
  • Leaf drop

Specific positive roles of adequate Mg

  • Increase sugar content in the fruit
  • Reduce fruit cracking
  • Better sugar to acid ratio (brix)
  • Increase fruit weight
  • Increase juice content

Specific negative impact of excess magnesium application

  • Can interfere with potassium and calcium uptake

Growing trees is fun, but if you want to have delicious, seasonal citrus fruit right away, join the Craft Citrus Club!

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