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Seed Orchard Replacement Guidelines: A Linear Programming Approach

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A linear programming model is used to determine when to replace a seed orchard with subsequent rotations reflecting additional genetic improvements. The objective is to maximize the net present value of the orchard while meeting specific production targets of exactly 1,000 pounds of seed per year. The solution calls for a 39 ac orchard over the 50-year planning horizon, and provides a schedule indicating both when and how much of the orchard is to be replaced. Slightly more than half (55%) of the first orchard rotation is replaced between years 13 and 21--roughly 13% in year 13, 14% in year 15, 16% in year 17, 4% in year 19, and 8% in year 21. The remaining 45% of the orchard is replaced at the maximum orchard age of 25. To meet production needs in years 25 through 34 without using additional orchard acreage, 2,550 pounds of surplus seed are produced between years 13 and 24. South. J. Appl. For. 15(3):117-125.

Document Type: Journal Article

Affiliations: Department of Forest Science and Texas Forest Service, Texas A&M University System, College Station, TX 77483-2135

Publication date: August 1, 1991

More about this publication?
  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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