mpai: Marginal Productivity Of Agricultural Inputs
Variable
Agricultural sector
Marginal Productivity Of Agricultural Inputs [Veg eq kg/$]
mpai = alai * ly * mlymc / lymc

mpai in the updating graph: ( how to read )
In nodes
alai : average life agricultural inputs
ly : land yield
lymc : land yield multiplier from capital
mlymc : marginal land yield multiplier from capital
Out nodes
fiald : fraction of agricultural inputs allocated to land development