Movement of bromide-ion and carbofuran in the humic sandy soil of a potato field with ridges and furrows : measurements in the field and computations with the PEARL model
In fields with ridges and furrows (like in potato growing), water flow and pesticide transport in soil may be more complicated than in level fields. In a field experiment, movement of bromide-ion (as a tracer) and of the insecticide carbofuran through a sandy soil with humic top layer to the groundwater was measured. About 15% of the dosage was transported along the ridge surface to the furrows by rainfall and sprinkler irrigation. The wide ranges of measured concentrations in soil indicate that transport in soil was highly irregular. In a first period, incidental high concentrations were measured in the groundwater besides a vast majority of much lower concentrations. Substance behaviour in the averaged field and in separate ridge and furrow systems was simulated with the PEARL model. The distribution of the substances in soil indicated that about 20% of the water surface-flowed from the ridges to the furrows in the first month. Downward movement of the substances in soil was distinctly greater for the furrow system than for the ridge system. This increases the risk of pesticide leaching to groundwater, as compared to that for a more level field
| Main Authors: | , |
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| Format: | External research report biblioteca |
| Language: | English |
| Published: |
Alterra
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| Subjects: | agricultural land, drenthe, groundwater pollution, leaching, pesticides, potatoes, sandy soils, aardappelen, grondwaterverontreiniging, landbouwgrond, pesticiden, uitspoelen, zandgronden, |
| Online Access: | https://research.wur.nl/en/publications/movement-of-bromide-ion-and-carbofuran-in-the-humic-sandy-soil-of |
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