AIWA E.A.
 Abstract
  Improvement in agricultural productivity has become a necessity 
  due to the limitation in expansion of cultivated acreage and ever increasing 
  food demand. Both methods of improving and the data can be accessed at the different 
  levels i.e., the farm or enterprise, industry, national to conduct analyses 
  for their own evaluations. 
  This paper discusses the methods how to better productivity by understanding 
  and measuring its sources of growth properly in general and at the farm level 
  in particular.
Key words: 
  concepts of productivity; measurement issues