Table 2: for percent reduction in soybean yield caused by season-long interference by Palmer amaranth in field experiment.a
Source of variation
Individual Palmer amaranth biotypesb
Palmer amaranth biotypes grouped by response to glyphosatec
value
Year
<0.0001
<0.0001
Biotype
0.0013
0.0010
Year × biotype
0.9135
0.4459
Distance
<0.0001
<0.0001
Year × distance
0.1296
0.1457
Biotype × distance
0.1980
0.8564
Year × biotype × distance
0.9150
0.6201
Coefficient of variation (%)
90.4
96.3
Data are pooled over runs of the experiment. Consists of six Palmer amaranth biotypes. Consists of a group of three glyphosate-resistant (GR) and a group of three glyphosate-susceptible (GS) Palmer amaranth biotypes.