Factors such as contamination, risk of nutritional imbalancesand depletion of natural resources shall be taken into consideration.Matter Produced on an Organic Farm Unit Farmyard & poultry manure, slurry, urine Permitted Crop residues and green manure Permitted Straw and other mulches PermittedMatter Produced Outside the Organic Farm Unit Blood meal, meat meal, bone meal and feather meal without R