<P> Salinity is an important land degradation problem . Soil salinity can be reduced by leaching soluble salts out of soil with excess irrigation water . Soil salinity control involves watertable control and flushing in combination with tile drainage or another form of subsurface drainage . A comprehensive treatment of soil salinity is available from the United Nations Food and Agriculture Organization . </P>
<P> Salinity is an important land degradation problem . Soil salinity can be reduced by leaching soluble salts out of soil with excess irrigation water . Soil salinity control involves watertable control and flushing in combination with tile drainage or another form of subsurface drainage . A comprehensive treatment of soil salinity is available from the United Nations Food and Agriculture Organization . </P>
describe how soil damage due to salinity could be reduced
describe how soil damage due to salinity could be reduced
by leaching soluble salts
by leaching soluble salts