monoculture - growing one type of crop, inter-cropping - 2 or more types of crop grown in alternating rows on a field, crop-rotation - each year change the crop that is grown in a particular field, bioaccummulation - the build up of pesticides and herbicides in a food chain - most toxic effects are at the top of the food chain, pesticide - chemical that kills organisms that feed off the crop plant, herbicide - chemicals that kill unwanted plant varieties/weeds, fertiliser - nutrients such as nitrate ions that plants need in order to synthesise proteins which can be added to the soil, biological control - using a pests natural predators instead of pesticide chemicals,

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