Calcium & Fulvic Acid for the Pumpkin Plants

This morning I gave the plants some CalMag with fulvic acid in the root zone.  Mr. Scherber said that in Orlando they talked about applying calcium with fulvic acid at the proper times of the season could help get more calcium into the fruit.  More calcium in the fruit some believe can help prevent splits.  I'd love to not have the pumpkins bust open on me so I thought I would give it a try.