Ventilation and Oxygen Supply - Manure composting is an important factor in the lack of air and oxygen. Fertilizer Weigh Fill Machine, Fertilizer Turner, Npk Granulator Machine, Salt Packaging Machine,Drum Drive Conveyor. Fertilizer machines The product will supply to all over the world, such as Europe, America, Australia,Suriname, South Africa,Ecuador, France.The roller extrusion granulator is used for fertilizer granulation, and can produce various concentrations, various organic fertilizers, inorganic fertilizers, biological fertilizers, magnetic fertilizers and compound fertilizers.