Other Code

Corn plant in block class
GameRegistry.registerBlock(cornPlant = new Corn("cornPlant"), "cornPlant");

Corn seed in items class
GameRegistry.registerItem(cornSeeds = new ModItemSeeds(BlockRegistry.cornPlant, Blocks.farmland, "cornSeeds"), "cornSeeds");

Corn food in items class
GameRegistry.registerItem(cornFood = new ModItemFood("cornFood", 4, 0.4f, false), "cornFood");