Poisonous plants are a major cause of economic loss to the livestock industry. Two poisonous plants common to Oregon are poison hemlock and Western water hemlock. Ingestion of either by humans or livestock typically results in death.
Poison hemlock is one of the most poisonous of plants. Silage making has been used to reduce the concentrations of toxins in a variety of crops. Poison hemlock alkaloids are found in different concentrations depending on several factors that make it virtually impossible to predict how dangerous the plant is at any given time.
Uneven grazing distribution patterns on rangeland can lead to overuse of forage in some areas and no use or waste of herbage in areas not visited by cattle. Range improvements affecting more even distribution of grazing utilization can increase pasture carrying capacity and allow stocking for extended periods. This article describes several science-based options for improving cattle grazing distribution in extensive rangeland pastures.