摘要：Rice is often produced
in the lowest parts of
the landscape. These
are good places to
grow rice because of the clayey soils
and the relatively humid conditions
because the groundwater is nearby.
However, this low position, often in
the floodplain of a river, makes the
crop prone to flooding. If excessive
water causes the crop to submerge,
serious yield losses can occur. It has
been estimated that, in Bangladesh
and India alone, approximately 4
million tons of rice are lost every
year. In South Asia, this is about
equivalent to the amount annually
consumed by 30 million people.
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