poster - International Conference of Agricultural Engineering

Soil Depth (mm)
Soil Depth (mm)
in the region 100-300 mm, below this area there is a reduction indicating that the compacting
vehicle traffic causes damage primarily in the layers between 100 and 300 mm.
It is noted in Table 3 that the PZ zone had the highest coefficient of variation between 25.9 to
65.2%, indicating that less intensive traffic promoted an uneven structure on the ground. In
TPSD zone was observed lower coefficients of variation. This may indicate a negative factor
that traffic more intensive machinery promoted greater uniformity in the soil structure,
reflected by higher compaction.
TABLE 3: Average cone index (CI), standard deviation (SD), coefficient of variation (CV) and
medium comparison test (MCT) for treatments and depths analyzed after planting.
Treatment
N
TPSD zone 20
PZ zone 26
CI (kPa)
SD (kPa)
CV (%)
MCT
IC (kPa)
SD (kPa)
CV (%)
MCT
Depths (mm)
0-100 110-200 210-300 310-400 410-510 510-600
4414 5481 4810 4304 4043 3612
2048 1277 1115 1093 804 700
46,4 23,3 23,2 25,2 19,9 19,4
A / bc A / a A / ab A / bc A / bc A / c
3293
2147
65,2
A / a
4004
2274
56,8
B / a
3633
1947
53,6
B / a
3525
1825
51,8
A / a
4184
1502
35,9
A / a
3576
926
25,9
A / a
Means followed by upper case in the same column do not differ statistically among themselves (Duncan, p