id	keyword
fens-952	water
fens-952	quality
fens-952	irrigation
fens-952	irrigation water
fens-952	food
fens-952	water quality
fens-952	good
fens-952	ouargla
fens-952	mg2 +
fens-952	environment
fens-952	volume
fens-952	issue
fens-952	xxii
fens-952	safety