Ecological Archives A014-005-A4

Scott D. Wilson, Jonathan D. Bakker, Janice M. Christian, Xingdong Li, Laura G. Ambrose, and John Waddington. 2004. Semiarid old-field restoration: is neighbor control needed? Ecological Applications 14:476–484.

Appendix D. Effects of neighbor control(C), seeding method (S), and mulch (M) on standing crop and root mass in three seeding years.

   
Standing crop
 
Root mass
   
df
SS
F
P
 
SS
F
P
                   
Plots seeded in 1994                  
   Neighbor control  
1
2.227
34.14
0.000
 
0.139
7.10
0.010
   Seeding method  
2
0.562
4.31
0.019
 
0.023
0.58
0.567
   Mulch  
1
0.130
1.99
0.165
 
0.132
6.75
0.012
   C × S  
2
0.149
1.14
0.327
 
0.005
0.12
0.885
   C × M  
1
0.014
0.22
0.641
 
0.052
2.64
0.111
   S × M  
2
0.092
0.71
0.499
 
0.087
2.22
0.120
   C × S × M  
2
0.060
0.46
0.635
 
0.008
0.20
0.817
   Error  
48
3.131
 
 
 
0.940
 
 
   Total  
59
6.366
 
 
 
1.385
 
 
                   
Plots seeded in 1995                  
   Neighbor control  
1
0.013
0.45
0.506
 
0.024
0.79
0.378
   Seeding method  
2
0.010
0.17
0.841
 
0.037
0.62
0.542
   C × S  
2
0.045
0.79
0.457
 
0.088
1.46
0.241
   Error  
54
1.535
 
 
 
1.626
 
 
   Total  
59
1.603
 
 
 
1.775
 
 
                   
Plots seeded in 1996                  
   Mulch  
1
0.124
3.48
0.078
 
0.014
0.43
0.519
   Error  
18
0.640
 
 
 
0.593
 
 
   Total  
19
0.764
 
 
 
0.607
 
 
                   
   Neighbor control  
1
0.005
0.11
0.741
 
0.003
0.11
0.741
   Seeding method  
2
0.590
7.08
0.002
 
0.370
6.64
0.003
   C × S  
2
0.217
2.61
0.083
 
0.092
1.65
0.202
   Error  
54
2.248
 
 
 
1.506
 
 
   Total  
59
3.060
 
 
 
1.971
 
 

   Notes: All statistics are from ANOVAs within each seeding year. Significant F values are in bold. Neighbor control (applied or not) and seeding method (unseeded, broadcast, drilled) were main factors in all sites and years. Straw mulch (applied or not) was a main factor in the 1994 seeding year. In the 1996 seeding year, mulch effects in plots that received neighbor control and broadcast seeding were examined with one-way ANOVA. The native hay seeding method was omitted from the analyses. Data were log-transformed prior to analysis.



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