Technical Abstract: Knowledge by practitioners regarding how to use nickel fertilizers in pecan orchard enterprises is a limiting factor in optimization of physiological efficiency and profitability of orchard enterprises. Knowledge by farmers and extension specialists about tree nickel nutritional needs, and how these needs are best satisfied, is meager. This review summarizes guidelines relating to how orchard nutritional management for nickel is best accomplished. This information assists pecan growers in efforts to optimize orchard yields and profits by ensuring optimal nickel nutritional status.