TECHNOLOGY FOCUS - BIOLOGY - Preferred Compositions: Preferably, the P. acidipropionici has activity at least 5.5x109 CFU/ml and/or the Bacillus at least 7.9x109 CFU/ml. The P. acidipropionici is preferably known strain P5. A preferred Bacillus ratio is 10 % B. subtilis, 20 % B. licheniformis and 70 % B. amyloliguefaciens. Preferably, the P. acidipropionici is in the form of vegetative cells and the Bacillus in the form of spores. The carrier is preferably a water soluble carrier, especially whey and/or maltodextrin (especially in a 1:1 ratio or at 40-60 wt.% whey and 40-60 wt.% maltodextrin); compositions comprising a water soluble carrier preferably also comprises a moisture binding agent, especially balith (especially at 50 wt.% whey, 49 wt.% maltodextrin and 1 wt.% balith).Production: Composition is produced by fermenting the specific bacterial strains, harvesting and freeze drying cells, milling to a uniform size and specified activity and combining bacteria and carrier (not claimed). A composition reducing nitrogen levels in nitrogen-containing material is produced by combining P. acidipropionici (preferably P5) having activity at least 5.5x109 CFU/g with Bacillus having activity at least 7.9x109 CFU/g and carrier (preferably maltodextrin and/or whey) (claimed). WIDER DISCLOSURE - Compositions as above comprising any protease-producing bacteria are disclosed as new.    EXAMPLE - Bacillus strains (9.0x109 colony forming units (CFU)/g), Propionibacterium acidipropionici strain P5 (1.1x1010 CFU/g) and water soluble carrier plus moisture binding agent (whey 50 wt.%, maltodextrin M100 49 wt.% and balith 1 wt.%) were mixed in a paddle blender (approximately 15 min.) to produce the composition. The composition was added to the primary lagoons at four swine farrowing facilities (2 pounds/1,000,000 gallons). Samples were taken at each lagoon before treatment and at 34 d and analyzed for total kjeldahl nitrogen, nitrates, nitrites, ammonia and N, P and K values routinely. As illustrated in the figure, composition addition reduced nitrogen available for the first crop (i.e. inorganic forms of nitrogen including ammonia, nitrate and nitrite utilized by plants in the first year) by 15 % to 43 % at 34 d compared to pre-treatment levels.