DTE Feather Meal is a powerful source of slow-release nitrogen(N) made from poultry feathers that have been hydrolyzed, dried, and then ground up. Nitrogen is an essential nutrient for all plants, but it's especially valuable to heavy feeders and long-season crops like corn, tomatoes and fall-harvested vegetables. When given a steady supply of nitrogen as they grow, all types of plants will produce plentiful shoots, flowers, vegetables and fruit.