This graphic present the Yield ratios for Grain Crops, from 1400 -1800, it is to compare the relationship between amount of seed sown and amount of grain harversed per area, 4 areas were choosen to draw down this graphic,
The indigo line A represent the quantity of grain harvested in Great Britain and Low Countries
The yellow B line represent the quantity of grain harvested in France, Spain and Italy
The blue line C represent the quantity of grain harvested in Central Europe and Scandinavia
The green line represent the quantity of grain harvested in Eastern Europe
If we can make a classification of best harvest of grain per areas, we can say A harvested more, followed by B, then C and finally D
