to other plants by feeding these microbes such as mycorhiza coated with insoluble fatty acid salts along with coated seeds for legumes the homogenous coating of insoluble fatty acid salts should be about one to two thousandths of an inch thick for other seeds such as grass seeds or for particles of rhizobia the homogenous coating should be about two to three thousandths of an inch thick most of the seeds coated in this way will be protected from conditions in the entire ruminant digestive tract many planting seeds are treated with very toxic substances such as insecticides rodenticides and other toxins which can harm animals that ingest them therefore care should be taken to select seeds for this treatment that are free from such substances the coated seeds and the coated particles of rhizobia can be fed directly to the ruminants by top dressing them on hay or combining them with any controlled feed or supplement in a preferred embodiment the seeds and particles are mixed into a feed supplement block a feed supplement block is generally made from molasses or other nutrients and used to supplement an animal 39 s diet and increase the animals productivity exemplary feed supplement blocks are disclosed in u s pat nos 4 749 578 and 5 622 739 and u s patent application ser no 08 755 150 all to benton el al these patents and patent applications are hereby incorporated by reference this delivery system has the added benefit of allowing the rancher to select areas for seeding with specific seeds at specific times a rancher may need to supplement areas that are overgrazed hillsides that are damaged by erosion or areas where cultivation of legumes is difficult while some of the coated seeds.