When Was The Agricultural Revolution?

The Agricultural Revolution began around 1701, with an invention by Jethro Tull (1674-1741) who invented the seed drill.  The drill was pulled by horses and sowed the seed in even rows.  This had been quite difficult to do by hand, because the wind often caught the seed and blew it in the wrong direction.
The seed drill also meant that the crop could be weeded and harvested without too much effort or wastage, so this invention revolutionised farming.
Shortly after this invention, various other machines began to be invented, these included ploughs, tillers, scythers etc so farming could be done much more intensively and labour requirements were not so demanding for the farmer.  For farm labourers, the Agricultural Revolution meant that many lost their jobs and also their homes, since they lived on the farms.  These people were forced to take their families and go to find work in towns.