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.
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. 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. HOW TO CHOOSE THE BEST EQUINE BIOTIN SUPPLEMENT FOR A HORSE?