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!