That's for soil based farming, personally I think Hydroponics (raising plants in water with no soil), Aeroponics (Hydroponics but grown in vertical towers), and Aquaponics (closed ecosystem using fish to fertilize the water the plants are grown in) are the only real way to feed a growing population and not destroy the environment. The Netherlands is already the leading European exporter of food, here is a great youtube video that touches on some of the ideas. https://www.youtube.com/watch?v=5clOYWsNhhk
Bottom line is that traditional Organic farming isn't the answer anymore than modern factory farming. AgTech is something I'm passionate about and I honestly believe that if we don't adopt more modern science will we face a large crisis in our food systems sooner rather than later. Some crops will need to be soil based (grains and related crops mostly) but nearly everything else grows faster, more reliably, and with out the need for chemical treatments. There are a large number of Hydroponic and Aquaponic farms already in operation but the percentage is still very small.