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.
Minerals are inorganic nutrients that are needed in relatively small quantities by the horse. The essential major minerals are calcium, phosphorus, magnesium, sodium, chloride, potassium and sulfur. The essential trace minerals needed are iron, zinc, copper, selenium, manganese, iodine, and cobalt.
Although results of studies show the amount of biotin needed by a horse is unclear-the recommended daily dose of Biotin is 15 - 20 mg per day-this is the amount generally recognised as being needed to promote quality and healthy horn.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.