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Table 6 Management practices and related costs for Populus hybrids short-rotation woody biomass crops in the northern USA and Populus deltoides in the southern USA (costs based on Dooley and Barlow [25])

From: A spatially explicit approach to modeling biological productivity and economic attractiveness of short-rotation woody crops in the eastern USA

Year Activity Northern cost, $US ha−1 Southern cost, $US ha−1
0 Herbicide/weed control 267 111
0 Site prep 74 173
0 Mechanical tillage 111 161
0 Plantinga 2501 571
1 Herbicide/weed control   111
1 Nitrogen fertilizer (67 kg ha−1)   146
2 Nitrogen fertilizer (224 kg ha−1) 484  
2 Nitrogen fertilizer (134 kg ha−1)   292
3 Nitrogen fertilizer (202 kg ha−1)   435
4 Harvestb X  
0 Stump removal (after harvest) 741  
6 Nitrogen fertilizer (180 kg ha−1)   435
8 Harvestc   X
0 Stump removal (after harvest)   $300
  1. aPlanting hybrid poplar in the north is at 10,005 cuttings ha−1; planting P. deltoides in the south is at 1730 cuttings ha−1
  2. bHarvesting occurs at ages 4, 8, 12, 16, 20, and 24 for hybrid poplar in the north
  3. cHarvesting occurs at ages 8, 16, and 24 for P. deltoides in the south