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. 2013 Dec 17;4:2918. doi: 10.1038/ncomms3918

Figure 1. Trends in total harvested area of staple crops and three major cereal crops.

Figure 1

Staple crops include cereal, oil, sugar, pulses, fibre, tuber plus root crops. The three major cereal crops are rice, wheat and maize. Slopes of the fitted trilinear models are shown when significant (Student’s t-test; P<0.01, n=47 years of yield data).