Ecological Archives A014-005-A2

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 B. A table showing effects of neighbor control, seeding method, and mulch on seedling establishment and survivorship in three seeding years.

Table B1. Effects of neighbor control (C), seeding method (S), and mulch (M) on seedling establishment (density in June of the seeding year) and survivorship (percentage change from June to August of the seeding year) in three seeding years. Other seeding methods (none and native hay) had low seedling densities and were omitted from analyses.

   
Establishment
Survivorship
 
df
SS
F
P
SS
F
P
Plots seeded in 1994       

Neighbor control

1
0.027
0.28
0.603
0.055
3.157
0.085

Seeding method

1
3.249
33.20
0.000
0.000
0.021
0.886

Mulch

1
0.095
0.97
0.333
0.008
0.462
0.502

C × S

1
0.008
0.09
0.771
0.055
3.125
0.087

C × M

1
0.170
1.73
0.197
0.005
0.258
0.615

S × M

1
0.120
1.22
0.277
0.145
8.298
0.007

C × S × M

1
0.258
2.64
0.114
0.001
0.062
0.805

Error

32
3.132
 
 
0.560
 
 

Total

39
7.058
 
 
0.829
 
 
 
Plots seeded in 1995

Neighbor control

1
0.018
0.09
0.761
0.013
0.22
0.641

Seeding method

1
5.244
27.33
0.000
0.010
0.18
0.671

C × S

1
0.107
0.56
0.459
0.046
0.81
0.375

Error

36
6.909
 
 
2.059
 
 

Total

39
12.278
 
 
2.128
 
 
 
Plots seeded in 1996

Mulch

1
0.284
1.30
0.269
0.542
1.52
0.233

Error

18
3.927
 
 
6.407
 
 

Total

19
4.211
 
 
6.949
 
 
 

Neighbor control

1
0.001
0.00
0.950
0.907
7.61
0.009

Seeding method

1
22.092
128.87
0.000
0.502
4.21
0.047

C × S

1
0.001
0.00
0.950
1.062
8.91
0.005

Error

36
6.171
 
 
4.291
 
 

Total

39
28.265
 
 
6.762
 
 

   Notes: All statistics are from ANOVAs within each seeding year. Significant F values are in bold. Neighbor control (applied or not) and seeding method (broadcast or drilled) were main factors in all years. 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. Seedling densities were log-transformed and survivorship percentages were square-root transformed prior to analysis of survivorship.



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