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Pesticide Use Causes Undesirable Effects to the Natural Environment
An evaluation of herbicide pollution in the Kerian Ricefields of Perak, Malaysia has determined that residues of 2,4-D and paraquat in the ricefield soil and surface water of the drainage canals leached downward to the depth of 5cm on the first day after treatment.

The use of pesticides in the agricultural sector in Malaysia, which have heavy rainfall, high humidity and high temperatures, has seen increased use of pesticides over the years. The use of pesticides and herbicides is required for successful rice cultivation with is the dominate crop.

Water samples collected from selected points in the drainage canals of the paddy fields were found to be highly polluted with 2,4-D as compared to paraquat. The research concluded that it is important to monitor the presence of pesticides in freshwater bodies because hazardous effluents from paddy fields directly drain into them and they are the most important sources of pesticide contaminate in coastal environments.

 
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Degraded Condition of Georgica Pond - Georgica Pond is eutrophic, with excessive nitrogen inputs from ground and surface water runoff feeding dense plant life, the decomposition of which is blamed for choking the pond of oxygen, the condition known as hypoxia. To combat that decomposition, the Friends of Georgica Pond Foundation has operated an aquatic weed harvester in recent summers to remove macroalgae before its decomposition can promote blooms of cyanobacteria, the blue-green algae that have beset the pond annually.


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