Okay, so I made an attempt to grow corn in containers this summer and was indeed able to grow somewhat successfully but I found strange light yellow fluid-filled balls in the soil when I was pulling up the old plants and roots. Is there something I should be worried about or are these the nitrogen balls that are on the roots from growing corn. I am getting ready to plant seeds for root veggies and really don't want to find out down the road after the fact that this is a really bad thing.