IELTS
JOURNAL
62
Section B
No activity affects more of the earth's surface than farming. It
shapes a third of the
planet's land area, not counting Antarctica, and the proportion is rising.
World food
output per head has risen by 4 per cent between the 1970s and 1980s mainly as a result
of increases in yields from land already in cultivation, but
also because more land has
been brought under the plough. Higher yields have been achieved by increased irrigation,
better crop breeding, and a doubling in the use of pesticides and chemical fertilisers in the
1970s and 1980s.
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