why did the Chinese ruler did not allowed the British trader to trade in opium with his own country

 the Chinese ruler was aware of the dangers of the opium addiction in so he had Forbidden both its production and sale except for medicinal purpose

who and when invented the reaper in USA

Cyrus McCormick invented the reaper in 1831

how much area of forest and grasslands was covered over in USA at the end of 18 century

At the end of 18 century forest covered over 1800 million acres and grassland 600 million acres

mention two covers that encloses become necessary in England in 18 century

1.  due to investment for longer term on land.
2. It also enable the richer landowners to expand the land under their control because it was necessary producing more for increasing market.  Market was increasing for three reason:-

•   increasing pollution
• Urbanisation
• War against France

Who was captain swing

 it was a mythical name used in the the threatening letters sent to the landowners who destroyed their threshers themselves which deprived vartman of air livelihood

what was the difference in making the enclosures in the 16 century and in the 18th century

 in the 16 century the enclosures we are made to promote sheep farming but in the 18th century the enclosure were made to increase grain production

explain the threatening of labourers to the honours of threshing machine

Through a letter as brief as the following :-
This is to acquaint you  that if yourthreshing machine are not destroyed by you directly we shall the commence our labours

in which two countries where agriculture development seen in England

 in 18th and 19th centuries

in which country did agricultural Revolution first occur

In England

why did the whole region of the great Plains become a dust Bowl

 the persistent doubt during the 1930s coupled with the ever increasing greed of the zealous farmers who had recklessly uprooted all vegetation facilitated the winds to blow with a Furious speed and turn the whole region into a dust bowl

in the 1660s' why did the farmers begin growing turnip and clove

They proved  a good fodder for the cattle moreover they increase the nitrogen content of the soil which provide with useful for crop growth

why was the land enclosed in the 18th century

 it was enclosed to promote grain production for the rising population which X over 4 times between 1750 and 1900.

why was the land enclosed in the 16th century

 it was influenced by the individual landlords to provide sheep farming

what did the enclosure imply

It implied a big piece of land which was enclosed from all sides and hedges where built around it separating it form the land of others