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because plants need light and space to be able to grow if there are weeds there then there is no space and they steal all the light, they can effectively choke a plant to death i they are so riddled with weeds.
Weeds compete with other plants for nutrients from the soil. Weeds in a maize crop would take nutrients the maize needs.
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoWeeds can take the nutrients from the ground that are needed to produce a good crop. Some weeds are poisonous to animals.
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Using specific examples, explain the effect of different environmental factors on phenotype of crop plants and animals?
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