For christ sake... Plant cell walls are made up of the insoluble sugar CELLULOSE - FACT.

Cellulose does NOT CONTAIN CALCIUM. This is basic school biochemistry.

You said only forms of soluble forms of calcium are CaCl2 and Ca2Co3.. (which is wrong eg CaI2? Calcium iodide is soluble in water, i could mention many more) why does your fertilise have calcium sulphate in - contradiction.

STOP TRYING TO EXPLAIN THINGS YOU DONT UNDERSTAND!
Bluefunk Reviewed by Bluefunk on . CALCIUM CALCIUM Calcium is used extensively in the plant as a component of mature cell walls. As long as the plant is growing, it needs a steady supply of calcium for proper growth and development. The only soluble calcium compounds are lime and calcium chloride. The amount of lime that can be used as a fertilizer is limited because it drives the pH up and interferes with the operation of the microbial population in the media. Calcium chloride almost must be used in small quantities, since the Rating: 5