Irrigation contribution/importance in crop production 
Corn production in Nebraska is irrigated.
Irrigation increases yield because of the water supply and cooling effect. 
irrigation cools canopy temperature and reduce heat stress \cite{Siebert_2014}. through evaporative cooling 
Irrigation cooling effect \cite{Bonfils_2007} irrigation causes large reductions in surface daytime temperatures.
irrigation mitigates heat stress and hot weather.  
climate condition affects farms decision of irrigation \cite{Knapp_2017}
Objective:
How vegetation properties, yield differs between rainfed and irrigated crops. 

Data and methods

Data

Method

MODIS data processing (on google earth engine).