Agriculture refers to the cultivation of plants and livestock for consumption. Agriculture systems are important for countries as they are a means of self-sufficiency, boosting fiscal sustainability by decreasing the need for imports and providing a source of revenue through exports. There are mainly two types of agricultural systems in the world - subsistence and commercial agriculture. Subsistence agricultural systems are smaller in scale, designed to provide for the farmer’s family, whereas commercial agriculture is much larger in scale, producing cash crops that can be sold. Agriculture systems includes material inputs (e.g. seed stocks, livestock, manpower, natural resources), service inputs (e.g. finance, accounting, research & development, logistics), firms (transformative and distributive) as well as regulatory agencies.