Nitrogen (N) is often the most limiting nutrient element throughout the cotton producing areas of Louisiana. Production problems may arise from either a deficient or an excessive supply of N. Inadequate N results in small, Stunted plants that prodce fewer fruiting branches and flowers. Growth is curtailed and total production is critically limited. An excessive Supply of N in the soil can result in tall, rank, cotton with an increased incidence of lodging, boll rot, and insect damage. This is especially true in combination with high rainfall late in the growing season (Rodrique). Since either of these situations can result in reduced yield, efficient N fertilization is a prerequisite to the production of maximum cotton yields.