Term
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Definition
| a description of the quantity of food crops grown for human consumption |
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Definition
| required by the increasing human population |
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Term
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Definition
| chemicals such as nitrates which increase crop yield |
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Definition
| plants and animals which reduce crop yield |
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Term
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Definition
| chemicals which can kill pests |
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Term
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Definition
| the buildup of toxic substances in organisms |
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Term
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Definition
| organism in the food chain most affected by bioaccumulation |
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Term
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Definition
| introducing a natural predator (or consumer) to control a pest population, used as an alternative to pesticides |
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Term
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Definition
| these nutrients needed for plant growth, are used to produce amino acids which are synthesised into plant proteins |
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Term
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Definition
| when fertilisers drain away from the soil into water ways |
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Term
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Definition
| Single celled, aquatic, organisms containing chlorophyll |
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Term
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Definition
| the result of fertilisers leaching into fresh water, adding extra, unwanted nitrates which increase algal populations |
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Definition
| organisms which use up large quantities of oxygen, reducing the oxygen availability for other organisms in aquatic environments |
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Term
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Definition
| two examples of food for bacteria in aquatic environments which makes them increase greatly in number |
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Term
| genetically modified crops |
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Definition
| crops which could be used to reduce the need for fertiisers |
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