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专利名称：Process for the production of fertilizer and
the fertilizer produced thereby
发明人：Bobby G. Davis申请号：US07/467331申请日：19900119公开号：US05043007A公开日：19910827
摘要：A method for forming a binder-free granular or semi-granular fertilizer isdisclosed, which comprises mixing a seed material and primary and secondary nutrientsources in a blender under heat until a slurry is formed, transferring the slurry to a longdryer, and drying the product under vacuum and thereafter gradually cooling theproduct to produce a granular or semi-granular fertilizer with a core of a seed materialand a coating of secondary nutrient salts crystallized thereabout, with nutrients andbiologically active agents entrained therein. The fertilizer formed has excellent stabilityand may be urea- free.
申请人：DAVIS; BOBBY G.
代理人：Arthur G. Yeager
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