Over the years, cereals have been the major food consumed by humans and have also been used in animal diet and therefore highly commendable for playing a major role in the preservation of human race. Studies have shown that half of the total percentage of calories consumed in the world is from cereals while it is also the most traded agricultural crop at the international market. This motivates the need to assess its utilisation in the past, present and future. This review shows that much driven by the use of cereals are factors like consumption and dietary pattern of a person or country, technological advancement in adding value to it, income status, market forces of demand and supply, level of affluence and policy. The trend in global cereals utilisation since its domestication has indicated an upward one with bulk of it being consumed as food in developing countries while majority of it goes into feeding livestock in developed countries. Evidence from this study also shows that the per capita utilisation of cereals directly for food is exceedingly great in developing countries than developed countries which is an indicator of malnutrition when not balance with other nutrients as it was observed in Bangladesh where calorie intake of an adult is about 90% from cereals. While there is a steady increase in global cereals utilisation due to its discovered industrial use as fuel, increased population and other factors, it will be expedient to focus on its sustainability and environmental issues that are likely to come up as a limitation to meet future demands.

Prior to the year 1970, agriculture was the main source of livelihood and backbone of the Nigerian economy until the discovery of oil drastically decelerated its potential to sustainably maintain food security and generate significant export earnings. Despite its sudden fall in productivity, agriculture still remains the main sector providing the highest employment (70% of the population) for the populace. To tackle these problems, many policies were formulated (from 1960 to 2015) to resuscitate the sector but to no availdue to failure in tailoring suitable policies to engage small-scale farmers and address other socio-economic problems. This paper constitutes an in-depth review of agricultural production and food security in Nigeria with relative importance attributed to local food supply and small-scale farmers. The article analyzes several documents of the Nigerian Government and international organizations, such as the Food and Agricultural Organization, the National Bureau of Statistics (NBS), Department of Agriculture and Rural Development and a number of peer-reviewed journals across various disciplines to provide a balanced interdisciplinary review. The paper concludes that food insecurity is at its peak in Nigeria and urgent attention is required in the agricultural sector to compensate for the unstable food balance in the country. There is a need for the Government to take strong measures against the food deficit situation and to support the development of the primary agriculture sector. The paper proposes viable policies that could involve smallholders, aid transformation and positively restructure the agricultural sector.