1 Also called natural aids. the means by which a rider communicates with and controls a horse, as the hands, legs, voice, and shifts in weight.  Also called artificial aids. the devices by means of which a rider increases control of a horse, as spurs, whip, and martingale.
Calories in a tangerine There are: 1  37 calories in a small tangerine. 2  45 calories for a medium tangerine. 3  52 calorie in a large tangerine.
Tangerine trees can contract several diseases, which display symptoms on the leaves or the fruit and are easily distinguished from one another. Most tangerine diseases can be controlled once identified.lternaria Brown Spot. Alternaria brown spot affects Dancy and Murcott tangerines, among other varieties of tangerine and citrus. The disease causes brown spots and yellow discoloring of tangerine leaves; leaves can eventually fall off the tree.