lymap: Land Yield Multiplier From Air Pollution
Variable
Agricultural sector
Land Yield Multiplier From Air Pollution [Dmnl]
lymap = clip ( lymap1 , lymap2 , appyear , time)

lymap in the updating graph: ( how to read )
In nodes
appyear : air pollution policy implementation time
lymap1 : land yield multipler from air pollution 1
lymap2 : land yield multiplier from air pollution 2
Out nodes
ly : land yield