Aqua and anhydrous ammonia: Good sources of nitrogen fertilizers but materials should be placed well away from plants to lessen chance of injury

Plant injury resulting from the use of aqua ammonia or anhydrous ammonia as sources of nitrogen has occurred when the materials were placed relatively close to young plants and—usually—at high rate of application. Ammonia injury reduces plant growth, delays maturity and yields are unsatisfactory. Usually injury is characterized by a burning-off of the smaller plant roots and by a yellowing or browning of the larger roots.