In addition to those listed here, both LiphaTech and Urbana manufacture peat-based special inoculants for lesser important species. Links to the major inoculant companies in the U.S. and Canada are also provided. Inoculants may be supplied in a sterile or non-sterile peat carrier, as a liquid preparation or as a frozen concentrate, and may be intended for seed or soil application. A clay base inoculant is also available for some species. The norm in the U.S. is to include more than one strain in each inoculant, but in Australia, Canada and France the inoculant usually contains only a single strain.
Commercial inoculants emphasize the major grain and pasture species, as listed at right.
Several companies manufacture peat base inoculants that already contain a sticker . This product can be applied directly to the seed, and is used without a delay while moistened, inoculated seeds dry. In Australia, some inoculants include Celstik TM , an adhesive and stabilizer intended to ensure more uniform inoculant coverage of seed. Where seeds are planted soon after inoculation, and into a good seed bed, it is possible that rhizobia and nodulation are not significantly affected. The University of Minnesota is an equal opportunity educator and employer.