The value of grain and meat rose compared to wool. Grain became six times its value in the previous reign. Wool fell from 20s.8d. per tod in 1546 to 16s. in 15s. So sheep-farming, which had taken about 5% of the arable land, was supplanted somewhat by crop-raising and the rural population could be employed for agriculture. In some places, the threefold system of rotation was replaced by alternating land used for crops with that used for pasture. The necessity of manuring and the rotation of crops and grasses such as clover for enrichment of the soil were recognized. Wheat, rye, barley, peas, and beans were raised. There was much appropriation of common land by individual owners by sale or force. Many farms were enclosed by fences or hedges so that each holder could be independent of his neighbors. Red and black currants, rhubarb, apricots, and oranges were now grown. These independent farmers could sell wool to clothiers, and butter, cheese, and meat to the towns. They also often did smithwork and ironwork, making nails, horseshoes, keys, locks, and agricultural implements to sell. A laborer could earn 6d. a day in winter and 7d. a day in summer. Unfree villeinage ceased on the royal estates. But most land was still farmed in common and worked in strips without enclosure. Windmills now had vanes to change the position of the sails when the wind direction changed. Formerly, the position of the sails was changed by manual labor. Prosperous traders and farmers who owned their own land assumed local offices as established members of the community. The population of the nation was about five million. Population expansion had allowed landlords to insist on shorter leases and higher rents, instead of having to choose between accepting a long lease and good rent or allowing their estates to pass out of cultivation. 90% of the population lived in the countryside and 5% in the London and 5% in the other towns. Over half the people of the nation were on the margin of subsistence. Life expectancy was about 40 years of age.