20 AGRICULTURAL SURVEY

which if it should be in some measure true with regard to ash particularly, it is easy to leave a headland of grass, or hedge green, as they are called in Hertfordshire; in some parts of which they are almost universal, and answer many good purposes. If any one will observe the difference of the number of trees, which may be raised by planting the hedge rows, instead of planting the corners of fields, as has been a fashion for some years past, they will be convinced that the former is the preferable method.