Indeterminate nodules are the only type found in Caesalpiniodeae and Mimosoideae and the most common type in Papilionoideae (Sprent, 2001; p. 32). As a result of the variety of ways the plant is infected by rhizobia, there are different types of nodules.
Vitamins are organic compounds that are needed in even smaller quantities than minerals by the horse, although no less critical. Vitamins can be divided into two groups, the fat soluble vitamins A, D, E and K and the water soluble C and B-complex vitamins.
Biotin, being a water-soluble vitamin, is not stored by a horse for very long. Any of the vitamin not used by the body cells will be passed out in the urine. So-if you have a horse with poor feet, a biotin vitamin supplement should be given daily in its feed.his advice is given because the vitamin Biotin is a sulphur which contains B vitamins, which help in maintaining good growth of the hoof horn. Added a horse or pony's feed over a period of months a supplement containing biotin can improve the problem of dry, cracked, brittle or generally bad feet.