a boggart, a brownie, and healthy crops

if a brownie is thanked it will be offended as if it thinks you have to thank it, if you do the brownie will leave. and return as dreadful boggarts who are so greedy you must thank them to keep them under control. the only way to return it to a brownie is to boil a boggart alive, then plant its remains in your crops. not only will your crops greatly prosper but you'll get a brownie back!!!!!!!!!!!! this is based of of real folklore in scottish clans