Agriculture Reference
In-Depth Information
Table 4.7
Microbial Biomass Carbon (kg C ha
−1
), Soil Animal Biomass C (kg C ha
−1
), Mineralizable Carbon (kg CO
2
-C ha
−1
), and Mineralizable
Nitrogen (kg NO
3
ions ha
−1
) in the Top 10 cm of No-Till and Stubble Mulch Fallow Winter Plots at Akron, Colorado (Elliott et al., 1984)
over 5 Dates in 1982
Variable
Treatment
8 June
6 July
2 August
23 August
13 September
ANOVA*
Microbial biomass (kg C ha
−1
)
Stubble mulch
245
204
271
186
255
P
= 0.019 (D)
No till
329
273
299
194
256
P
= 0.054 (T)
Collembola × 100 (kg C ha
−1
)
Stubble mulch
6.69
1.03
2.18
0.61
1.49
P
= 0.019 (T × D)
No till
5.58
8.29
4.01
2.60
1.49
Acari × 10 (kg C ha
−1
)
Stubble mulch
3.77
0.47
0.91
0.40
0.92
P
= 0.020 (T × D)
No till
3.60
3.31
1.24
1.32
0.54
Holophagous nematodes ×
100 (kg C ha
−1
)
Stubble mulch
0.88
0.46
1.12
0.51
0.56
P
= 0.002 (T × D)
No till
0.48
1.69
0.96
0.57
0.32
Protozoa (kg C ha
−1
)
Stubble mulch
1.76
0.67
0.74
1.96
1.92
P
= 0.001 (D)
No till
2.20
0.96
0.93
2.29
1.61
Respired carbon (kg CO
2
ha
−1
)
Stubble mulch
49
42
56
53
24
P
= 0.075 (D)
No till
80
69
84
57
24
P
= 0.042 (T)
Mineralizable nitrogen
(kg NO
3
ha
−1
)
Stubble mulch
10.63
6.39
5.79
2.62
1.95
P
= 0.026 (D × T)
No till
12.68
5.79
8.90
−3.31
−1.38
Level of highest significant interaction for analysis of variance (ANOVA) of five dates (D) × two treatments (T) × three field replicates.
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