Mani Skaria, Ph.D.
Calcium is the most abundant mineral element in the human body., taking up 2% of the body weight. Our body needs 1000 to 2000 milligram calcium daily. Together with phosphorous, calcium provides structure and strength to bones and teeth.
The figure at the right is the symbol of Calcium, as per the periodic table. Ca = Calcium, 20 is the atomic number (number of protons), and 40.08 is the relative atomic mass (protons + neutrons). It is a hard metal. It is the 5th most abundant element in the earth’s crust.
It is a solid at room temperature. It was first made in Germany in 1669 by Henning Brandt. Elemental phosphorous exists in two major forms, white phosphorous and red phosphorous. It is highly reactive; therefore, it is not found as a free element on earth.
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 Calcium- Top seven reasons
- It is the key component of cell walls
- It regulates enzymes
- It regulates plant hormones
- Helps nutrient uptake
- For leaf strength
- Better fruit yield
- For better fruit set
- Helps fight root diseases caused by fungi
- Helps reduce post-harvest fruit decay
- Increase resistance to heat and cold stress
- Increase fruit shelf life
How much Calcium is needed?
Calcium accounts for over 20% of the nutrient content. Citrus leaves contain 3-6% calcium in dry matter.
How do I know my citrus plant is suffering from Calcium deficiency?
- Trees lack vigor
- Trees defoliate
- Poor root development and trees stunt
- Root system prone to fungal infections
- Fruit show albedo
- Fruit pitting, creasing and splitting
Specific positive roles of adequate Calcium
- Increase yield
- Increase fruit weight
- Increase shelf life
- Fight diseases