food for thought::
the amount of actual real food farmed today is due to technology /pesticides leading to the introduction of high-yield crops.
also
Quote:
The United Nations has completed the first global assessment of the state of the planet's land resources, finding in a report that a quarter of all farmland is highly degraded and warning the trend must be reversed if the world's growing population is to be fed.
The UN Food and Agriculture Organisation (FAO) estimates that farmers will have to produce 70% more food by 2050 to meet the needs of the world's expected 9-billion-strong population.
But as it is, most available farmland is already being farmed, and in ways that decrease its productivity through practices that lead to soil erosion and wasting of water.
This means that to meet the world's future food needs, a major "sustainable intensification" of agricultural productivity on existing farmland will be necessary
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http://www.fao.org/nr/water/news/Sol...onference.html