measurement was possible. As late as 1820 the acre was of many
different sizes in England. In Bedfordshire it was 2 roods, in Dorset
134 perches instead of 160, in Lincolnshire 5 roods, in Staffordshire
2-1/4 acres. To-day the Cheshire acre is 10,240 square yards. As,
however, an acre was and is a day's ploughing for a team, we may
assume that the most usual acre was the same area then as now. There
were also half-acre strips, but whatever the size the strips were
divided one from another by narrow grass paths generally called
'balks', and at the end of a group of these strips was the 'headland'
where the plough turned, the name being common to-day. Many of these
common fields remained until well on in the nineteenth century; in
1815 half the county of Huntingdon was in this condition, and a few
still exist.[9] Cultivating the same field year after year naturally
exhausted the soil, so that the two-field system came in, under which
one was cultivated and the other left fallow; and this was followed by
the three-field system, by which two were cropped in any one year and
one lay fallow, the last-named becoming general as it yielded better
results, though the former continued, especially in the North. Under
the three-field plan the husbandman early in the autumn would plough
the field that had been lying fallow during summer, and sow wheat or
rye; in the spring he broke up the stubble of the field on which the
last wheat crop had been grown and sowed barley or oats; in June he
ploughed up the stubble of the last spring crop and fallowed the
field.[10] As soon as the crops began to grow in the arable fields and
the grass in the meadows to spring, they were carefully fenced to
prevent trespass of man and beast; and, as soon as the crops came off,
the fields became common for all the village to turn their stock upon,
the arable fields being usually common from Lammas (August 1) to
Candlemas (February 2) and the meadows from July 6, old Midsummer Day,
to Candlemas[11]; but as in this climate the season both of hay and