Table 1.

Number of target trees/ha (≥ 0.3 m [1 ft] tall) in wire zones and border zones of ten treatment units at the Green Lane Research and Demonstration Area in 2003 and 2004 (number of target trees per acre are given in parentheses). A second handcut unit (HC-1) was established in 2001 beneath the tower from a portion of a mowing unit (M-2); this portion could not be mowed because of rocky terrain.

Treatment unit (replicate)Wire zoneBorder zone
2003200420032004
Mechanical units
Handcut
HC-14,199 (1,700)3,211 (1,300)1,482 (600)3,952 (1,600)
HC-23,582 (1,450)3,705 (1,500)4,940 (2,000)2,964 (1,200)
Average3,891 (1,575)3,458 (1,400)3,211 (1,300)3,458 (1,400)
Mowing
M-1988 (400)1,235 (500)1,729 (700)741 (300)
M-22,347 (950)3,829 (1,550)494 (200)741 (300)
Average1,668 (675)2,532 (1,025)1,112 (450)741 (300)
Herbicidal units
Mowing plus herbicide
MH-1371 (150)371 (150)247 (100)1,235 (500)
MH-21,153 (467)1,235 (500)2,638 (1,068)3,293 (1,333)
Average762 (309)803 (325)1,443 (584)2,264 (917)
Foliage spray
F-1988 (400)865 (350)1,729 (700)3,458 (1,400)
F-2371 (150)618 (250)988 (400)494 (200)
Average680 (275)742 (300)1,359 (550)1,976 (800)
Stem–foliage spray
SF-1247 (100)412 (167)494 (200)825 (334)
SF-2988 (400)865 (350)247 (100)1,235 (500)
Average618 (250)639 (259)371 (150)1,030 (417)
All units
Average1,524 (617)1,635 (662)1,499 (607)1,894 (767)
Mechanical units combined
Average2,780 (1,125)2,995 (1,213)2,162 (875)2,100 (850)
Herbicidal units combined
Average687 (278)728 (295)1,058 (428)1,757 (711)