Measuring The Technical And Economic Efficiency Of Both: Sequencing The Rice-Wheat Crops System, And Fallow-Rice System, Using Data Envelopment Analysis Method In Iraq 2017 Journal title: IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS) Authors: Dr. Emad Ammar Ismail, Samir Shaal Ansalih Subject(s):