The water Economist has estimated short run water responsiveness function for rice farming under major irrigation condition in the Dry Zone of Sri Lanka as follows; Y = 21W +30.3W2 – 3W3, Where Y = Output (paddy kg /Acre) , W = irrigation Water (Cubic Meter – m3) a) Determine three stages of this short run production process and graphically show the result. b) Determine rational production stage and what is the maximum and minimum output level of this rational stage. c) Determine the range of water level which is representing the low of diminishing marginal returns.
The water Economist has estimated short run water responsiveness
function for rice farming under major irrigation condition in the Dry
Zone of Sri Lanka as follows;
Y = 21W +30.3W2 – 3W3, Where Y = Output (paddy kg /Acre) , W =
irrigation Water (Cubic Meter – m3)
a) Determine three stages of this short run production process and
graphically show the result.
b) Determine rational production stage and what is the maximum and
minimum output level of this rational stage.
c) Determine the range of water level which is representing the low of
diminishing marginal returns.


