Using manure on the allotment can be a great way to improve soil fertility and structure, but it needs a bit of care. Well-rotted manure is best, as fresh manure can burn plants and encourage weeds. Apply it in autumn or well before planting, and dig it in lightly or leave it on the surface to let worms do the work. Always check the source and avoid overuse to prevent nutrient run-off. Used properly, manure is an excellent, natural boost for healthy crops.