Methods of managing timberland
A method of managing timberland to optimize the combined revenue of a softwood tree crop and an energy crop generally includes planting a softwood tree crop in adjacent first and second rows, wherein the softwood tree crop has a tree spacing between adjacent trees and a row spacing in the range of about 15 to about 25 feet between the first and second rows, planting an energy crop in the row spacing, wherein the energy crop is a regenerating lignocellulosic energy crop, and periodically harvesting the energy crop. Methods of managing timberland to optimize the plot growth rate for a plot including a softwood tree crop and an energy crop, and to optimize the total plot volume of a softwood tree crop and an energy crop are also provided.
1. A method of managing timberland to optimize the combined revenue of a softwood tree crop and an energy crop, comprising:
(a) planting a softwood tree crop in adjacent first and second rows, wherein the softwood tree crop has a tree spacing between adjacent trees and a row spacing in the range of about 15 to about 25 feet between the first and second rows;
(b) planting an energy crop in the row spacing, wherein the energy crop is a regenerating lignocellulosic energy crop; and
(c) periodically harvesting the energy crop.
2. The method of claim 1 , wherein the energy crop is planted within the same growing season as the softwood tree crop.
3. The method of claim 1 , wherein the energy crop is harvested at least annually.
4. The method of claim 1 , wherein the energy crop is harvested in the range of 6-12 harvest.
5. The method of claim 1 , wherein the softwood tree crop is selected from the group consisting of pine trees, araucaria trees, fir trees, and hemlock trees.
6. The method of claim 1 , wherein the energy crop is selected from the group consisting of switch grass, miscanthus, giant reed, energy cane, and napier grass.
7. The method of claim 1 , wherein the tree spacing is at least about 5 feet.
8. The method of claim 1 , further comprising partially harvesting a portion of the softwood tree crop such that the final value of the softwood tree crop will be maximized and harvesting the remainder of the softwood tree crop at a time when the final value of the softwood tree crop will be maximized.