ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Companion planting of marigolds and sweet peppers. Companion planting is the practice of using certain crops to repel insect pests. Marigolds are believed to repel nematodes (worms) that attack roots. Photographed on an organic farm. Organic farming aims to reduce the use of artificial substances in farming, and to eliminate genetically- modified organisms.
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