Technology of organic and organic-mineral fertilizers production from poultry manure.

Nutrients in organic fertilizers are presented as organic compounds and have a plant and animal origin. Commonly applied in practice are farmyard manure, poultry manure, peat, crop residues, composts etc. Organic fertilizers have lower nutrient content then mineral fertilizers but ratio of nutrient content is near to then optimal. Besides NPK they have calcium, magnesium, sulfur and many microelements as boron, molybdenum, copper, zinc, manganese, iron. We can combine the good parts of organic and inorganic fertilizers after mixing them. Thereby we will have an organic-mineral fertilizer with higher nutrients content and we can provide to the crops nutrients with specifi c ratios (1,2,3,4).