Concentrates are phytogenics or animal origin fodders. There is more than 6,5 MJ NEL energy, more than 200 g digestible crude protein, low content of fibre (less then 18%) per kg of dry matter and the most contained minerals are acid-forming elements (P, S, Cl, etc.). Grain fodder general alkality is negative.
This fodders are used for reffiling of missing nutrient in feeding ration, which aren't supplied by roughage and for complete and supplementary feed mixtures producing. This group of feeds includes grain crops, legumes, food industry by-products and dried phytogenics or animal origin feeds.