Requirements and conditions for organic fertilizers produced by the treatment of olive residues are: (a) conservation of the product in a dry place, with a good circulation of air and provided with a good drainage; (b) the industry shall be at least 3 km from residential areas, public establishments, animal-breeding centres, veterinary and medicine industries, and water sources; (c) direction of wind shall be taken into consideration; (d) producers shall afforest the site with wind resistant tre