The graph shows the world total harvested area for grain in million hectares between 1950 and 1996. In general, the total harvested area increased until 1980, at which point there was a reduction in the area due to retrenchment. In 1950 almost 600 million hectares area were harvested for grain in world wide. During the 1950s the USSR initiated a virgin land program which greatly increased the area harvested to around 650 million hectares. From this point the area harvested increased slowly with some fluctuations, to just over 700 million hectares. Then around 1975 the price of grain doubled and this caused a rapid increase in the amount of land devoted to grain production until 1980. From 1980 to 1995 there was a gradual decrease in the amount of land used for grain cultivation. After this the area harvested again began to rise. In summary, we can see that the area devoted to grain production was affected by both government policy and market forces.
The graph shows the peoples in thousands who entered in the UK for immigration between 1940 and 1970. The number of immigrants from there different countries increased until 1963, at which point there was a sharp reduction in west Indies immigrants while the Pakistani and Indian number continually increased. In 1940 almost 4 thousand Indian and Pakistani immigrate in UK but only around two thousand west Indies migrate into the Uk. During 1950s the numbers of immigrants gradually increased . But from 1952 the numbers of immigrants from west indies rose with some fluctuation. However it was between 1958 and 1960 when west Indies nubers of immigrants jumped from 10 thousands to just over thirty five thousands, at which point