Claim 1: A composition of an agricultural microbial inoculant characterized in that it comprises i) at least one species of agriculturally beneficial Bacillus that is selected from the group consisting of Bacillus amyloliquefaciens, Bacillus licheniformis, Bacillus thuringiensis, Bacillus pumilis or any combination of this； and ii) at least one organic solvent that is selected from the group consisting of propylene glycol (PG),N-methyl-2-pyrrolidine (NMP),Triethylene glycol monobutyl ether, glycerin, DMSO or any combination thereof. Claim 17: it contains a group of elements for inoculating agricultural microorganisms, which is characterized by containing part a, wherein part a contains urea inhibitor and at least one organic solvent, and the urea inhibitor is selected from n-butil sulfuryl fluoride group,Trimethylamine phosphate n - (n-butil) calcium phosphate, thiotriamide, phenylammonium phosphate, trimethylamine n-cyclohexane, thiotriamide, triacylphosphor phosphate, triacylphosphor phosphate, triacylhydrazide phosphate, hydroquinone, p-benzoquinona, hexamethylammonium triphosphate, thiopyridine, thiodylpyridine, endosulfan, thiodimethylmethyl ether N-dihalo-2-imidazolidinona, n-halo-2-oxazolidinona, triamida n - (2-nitrofenil) tiofosforica, triamida n - (2-nitrofenil) phosphine or any combination thereof, wherein the organic solvent is selected from the group of acrylonitrile (PG),N-methyl-2-pyrrolidine (NMP),Triethylene glycol monobutyl ether, glycerin, diethyl sulfur dioxide (DMSO) or any combination thereof； and part B, wherein part B includes at least one Bacillus selected from the group, including amritz bacillus, l-scheinier bacillus, thuringiens bacillus, Part a and part B are respectively packed in different containers. Requirement 28: a method of promoting plant growth, plant productivity and / or soil quality,It is characterized by the fact that it involves the effective vaccination of an agricultural microorganism in accordance with the first requirem
