I. Introduction
Increase in the human population has increased the demand for food resources. The latest report from ‘Population Reference Bureau’ shows the population according to 2016 is 7.4 billion [1]. The Food and Agricultural Organisation (FAO) of the United Nations (UN) in 2009 estimated that population growth would reach 9.1 billion by 2050 [2]. The revised report in 2015 by UN World Population Prospects had estimated that the population would reach 9.7 billion by 2050 and 11.2 billion by 2100 [3].