In soil, most of the zinc stays bound to the solid particles. When high levels of zinc are present in soils, such as at a hazardous waste site, the metal can seep into the groundwater. Industries also can release dust containing higher levels of zinc into the air we breathe.
Add sorghum to a large pot of water. Use one cup of whole grain sorghum to three cups of water. Bring to a boil, reduce to a simmer and let cook for approximately 40-55 minutes or until the sorghum is tender. Drain any remaining liquid and serve.
Pour the water into a large pot, and stir the sugar and 1/2 cup salt together until dissolved. Place the ears of corn into the pot, and allow to soak at least 30 minutes but no longer than 8 hours. Preheat an outdoor grill for high heat, and lightly oil the grate. Remove the corn from the soak and grill the ears, turning every 2 to 3 minutes to cook the kernels on all sides. Brush the grilled corn with butter, and season to taste with salt and pepper.