Put the oats in a blender or spice grinder and process them into a fine flour, about 30 seconds.
Put the turnip, beet, and carrots in a colander in the sink and squeeze to remove excess moisture.
Transfer the vegetables to a large bowl, and add the kale, parsley, chives, dill, nutritional yeast, garlic powder, salt, and pepper. Stir to combine. Add the oat flour and stir until evenly distributed.
Heat ½ tablespoon oil in a large cast-iron or nonstick skillet over medium-high heat. Scoop ¼ cup of the vegetable mixture into the preheated pan for each pancake. Slightly flatten each pancake with a spatula.
Cook until the pancakes are golden brown and crispy on the bottom, 3 to 5 minutes. Flip with a spatula and cook until the other side is brown and crispy, 3 to 5 minutes longer.
Repeat the cooking process with the remaining oil and vegetable mixture.