SOIL REDISTRIBUTION AND PESTICIDE CONTAMINATION IN CULTIVATED FIELDS

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SOIL REDISTRIBUTION AND PESTICIDE CONTAMINATION
IN CULTIVATED FIELDS AT FATEH JANG
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STUDY AREA FATEH JANG IN POTHWAR
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FIELD INVESTIGATIONS Study
Site Fateh Jang 1. Cultivated Fields at Mangial
Field 1 0.322 ha (Improved farming
practices) Field 2 0.426 ha (conventional
cultivation by farmer) Physical analysis Sampling
Mechanical Analysis Textural
Bulk Depth Sand Silt
Clay Class density (cm)
() () ()
(gms/cu.cm) 0-15 7
75 18 Silt Loam
1.45 15-30 7 74
19 Silt Loam 1.45
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• Chemical analysis
• Sampling EC SAR pH
  Organic matter
• depth (cm) (m.mhos)
  ()
• 0-15 0.85 0.60
  7.90 0.67
• 15-30 0.55 0.45
  7.87 0.60

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SAMPLING AND ANALYSIS

• Soil sampling from cultivated fields
• Analysis for Cs-137
• Sampling of runoff Water
• Collection of periodic soil samples for
  herbicides
• Collection of sediment samples for Cs-137, grain
  size, herbicides
• Collection of plant samples for herbicides
• Surveying
• Measurement of runoff discharge

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Fatehjang Reference Site
137Cs Inventory of of Ref. Site 1701 Bq/m2
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Cs-137 in Bulk Cores at Fateh Jang Reference Site
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Depth profile of 137Cs inventory at Fateh Jang
Total inventory 858 Bq/m2
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No. of Bulk cores 16 Depth 30 cm Mean 137Cs
Inventory 3208 SD 848 CV 26.4 Excluding
the lowest value Mean 137Cs Inventory 3361 SD
605 CV 18
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TOPOGRAPHIC CONTOURS
THREE DIMENSIONAL VIEW OF FIELD-1
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Contour of Cs-137 inventory at Field-1
Three-dimensional view of Cs-137
Inventory in Field-1 taking bulk core samples up
to 19.5 cm
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Contours of soil loss at Field-1
14.2 t/ha/yr
Soil redistribution in Field-1 using Proportional
Model (20 cm)
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Soil redistribution in Field-1 using Mass Balance
Model (20cm)
16.4 t/ha/yr
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Soil redistribution in Field-1 using Proportional
Model (30 cm)
8.7 t/ha/yr
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Soil redistribution in Field-1 using Mass Balance
Model (30 cm)
10.1 t/ha/yr
Runoff Sediment Data 4.63 t/ha.yr, 524 m3 Field
2 20.1 t/ha.yr, 1095 m3, rain 480 mm
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Location and Cs-137 inventory of sampling points
at Field-2