At present, humankind utilises approximately 50 per cent of accessible, productive land for agriculture. Put another way, half of the Earth's surface that is not desert, water, ice or some other such unusable space such as urbanised areas is used to grow crops.
With current emphasis firmly upon increasing productivity to meet current and future demand for food, feed and fuel from an expanding, wealthier global population, the fact that we only use half of the usable global stock of farmland indicates that we should be able to simply bring more land under agricultural cultivation through the application of well-placed infrastructure and technology investments. Unfortunately, the situation as always, is not quite as simplistic as that. In fact, the land we do not currently use for agriculture remains so because it accommodates vital natural ecosystems, is located in areas of conflict, or is simply not capable of producing commercially viable yields at current commodity prices i.e. the revenue created from the land does not cover the cost of the farming operations due to poor yields.