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A Brief Overview on Crop Science
This document shows graphs of the yield per hectare from 1961 to 2009 for several key crops like maize, potatoes, rice, soybeans and wheat. The yields for all crops have increased significantly over this period. A second graph shows the global supply of calories per person per day from major food sources like maize, potatoes, rice, soybeans and wheat, which has also risen considerably since 1961 according to the food supply quantity data.
Food◦
A Brief Overview on Crop Science
- 3. • • • 0 0.5 1 1.5 2 2.5 3 3.5 1961 1965 1969 1973 1977 1981 1985 1989 1993 1997 2001 2005 2009 Yield (Hg/Ha) Maize, greenMaize Potatoes Rice, paddy Soybeans Wheat 0 100 200 300 400 500 600 1961 1965 1969 1973 1977 1981 1985 1989 1993 1997 2001 2005 2009 Food supply quantity (kcal/capita/day) Maize Potatoes Rice Soyabean Oil Soyabeans Wheat