Jack if the farmer ploughs it in rather than just cultivating the surface or just leaving it then the result is much more short lived. It is possible, and I have ensured,in the past that the nuisance is reduced to a reasonable level in a reasonable length of time. It is, however, not the easiest nuisance to deal with, some farmers are reasonable, but many are not. Some EHO, prefer an easier life than confronting awkward farmers, make your point strongly if you want more action to alleviate the alleged nuisance.