Fertilizers and Pesticides

Fertilizers and Pesticides - winter Less algal growth as...

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Aims of the session:  Learn about fertilisers and their effects on the environment.  Be able to answer exam questions on the effects.  Learn about Pesticides and their effects  Summarise the key points about pesticides
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Fertilisers and Pesticides
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Fertilisers
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The process of Eutrophication
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The process of Eutrophication cont.
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Biochemical Oxygen Demand (BOD).  This measures the rate of oxygen consumption by a  sample of water, and therefore gives a good  indication of eutrophication. A high BOD means lots  of organic material and aerobic microbes, i.e.  eutrophication  
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The nitrate concentration falls during spring and summer and rises during autumn and
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Unformatted text preview: winter Less algal growth as autumn begins Possibly all plants have died Pesticides Pesticides Include: Herbicides Insecticides Fungicides Bactericides Pesticides Persistence + Lipid solubility = Bioacculmulation Bioaccumulation w a t e r z o o p l a n k t o n 0 . 0 4 p p m s m a l l f i s h 0 . 5 p p m l a r g e f i s h 2 p p m b i r d s 2 5 p p m E.g DDT This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching....
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Fertilizers and Pesticides - winter Less algal growth as...

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