Crop Residue Biomass Effects on Agricultural Runoff
Table 2
Biomass residue and field length effects on runoff, TSS, DOC, and TSS-C in the 274 m long field. Shown are means (standard error), as well as analysis of variance results. .
Location (m)
Treatment
Runoff (m3 ha−1)
TSS conc (mg L−1)
TSS export (kg ha−1)
DOC conc (mg L−1)
DOC export (kg ha−1)
DOC storage (kg ha−1)
TSS-C export (kg ha−1)
91
Control
4140 (289)b
343 (119)
712 (142)b
2.5 (0.2)c
9.1 (0.9)
0.9 (0.9)
111 (13)
Low
3579 (847)b
213 (50)
508 (141)a
4.4 (0.6)bc
10.5 (1.8)
−0.6 (1.8)
85 (17)
Medium
3702 (381)b
234 (54)
469 (41)a
5.1 (1.0)b
13.4 (0.6)
−3.4 (0.7)
90 (25)
High
2373 (149)a
309 (34)
447 (75)a
8.7 (0.8)a
13.1 (1.3)
−4.5 (2.1)
90 (23)
183
Control
905 (166)y
963 (242)
507 (50)x
3.2 (0.2)z
2.3 (0.2)
2.7 (0.2)
33 (10)
Low
870 (146)y
191 (33)
95 (6)y
5.8 (1.1)yz
3.5 (0.1)
1.5 (0.0)
21 (2)
Medium
503 (199)y
654 (292)
155 (45)y
12.2 (3.5)y
3.5 (0.4)
1.5 (0.4)
18 (9)
High
135 (45)x
507 (104)
51 (4)y
30.5 (3.6)x
2.7 (0.9)
2.3 (0.8)
5 (3)
Two-way ANOVA results
Biomass
*
NS
**
***
NS
NS
NS
Length
***
*
***
***
***
***
**
Biomass × length
NS
NS
NS
***
NS
NS
NS
For each variable and length, values designated with the same letters are not significantly different ().
