Pearl millet is the highest yield potential among millets because of its hybrid heterosis. Because millet s have no prussic acid potential, hybrid pearl millet is preferred for grazing under conditions in which prussic acid might be hazardous. Millets, like any plant, can still accumulate nitrates and should be tested if high nitrates are a potential concern. Pearl millet is more tolerant of sandy and calcareous soils than sorghum-Sudan, but less tolerant of heavy clay or wet soils. Pearl millet is usually higher in protein than sorghum but loses adaptability more rapidly upon maturity and unlike sorghums, pearl millet is safe for horses.