_GENERAL DOCUMENTS - C1981017 ‎(227)‎

• Permit No: C1981017
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Name: Bid Documents ‎(IMP)‎ 2000 Correspondence
• Permit Index Doc Type: General Correspondence
• Media Type: D
• Archive: No

2000 Noxious Weed Density Summary*
Sutey Reference Area#2
Transect* Thistles per square Houndstongue per Total per square meter
meter square meter
6 1.2 0.4 1.6
7 1.2 0.8 2.0
8 1.0 0.5 1.5
9 0.8 0.6 1.4
10 1.0 1.5 2.4
*Transects correspond to transects labeled 1-5 in 1999 report.
Thistle sample mean= 1.0 plants per square meter
Houndstongue sample mean= 0.8 plants per square meter
Noxious total = 1.8 plants per square meter
1998/1999/2000 Weed Density (Thistles and Houndstongue combined)
1998 Sample Mean . . . . . 10.3 plants per square meter
True Mean . . . . . . . . . . . . 6.2<u<14.4; 99% C.I.
1999 Sample Mean . . . . . . 4.9 plants per square meter
True Mean . . . . . . . . . . . . . 4.4<u<5.4; 99% C.I.
2000 Sample Mean . . . . . . . 1.8 plants per square meter
True Mean . . . . . . . . . . . . . . 1.0<u<2.6; 99% C.I.
Density of the noxious species decreased between 1998 and 1999 and between 1999 and 2000.
The difference each year was statistically significant at the 99% level of statistical confidence
(alpha= .01; 2 tail, 4 df).
*Thistle species were plumeless thistle and Canada thistle primarily, with scattered musk thistle.
Oxeye daisy was present, but was a very minor component of the stand.