Fields around organic farms have more types of wild plants, providing benefits for wildlife, say scientists.The research is likely to fuel the debate over the environmental benefits of organic farming.Studies suggest that organic farming produces lower yields than conventional methods but harbours more wildlife.The new study, by researchers at the University of Swansea and institutes in France, looked at fields sowed with winter wheat in the region of Poitou-Charente.They found that organic farming led to higher weed diversity on surrounding conventionally farmed fields."Wild plants are important for birds, bees and other farmland species," said Dr Luca Borger of the department of biosciences at Swansea University."Organic farming has advantages in maintaining these, but even a mixture of organic and non-organic farming in an area can help maintain this biodiversity."Even only 25% of fields being organically farmed can make a difference.