Yes, organic can yield comparable to conventional

In doing a literature review, I am reading about nitrogen and its impact on yield. There is a great myth that organic agriculture requires more land than than conventional; that is simply not true if you read the literature. Improperly managed organic systems yield less, and properly managed organic systems have comparable yields to conventional.
[Nitrogen is often a limiting factor, which is why I'm going through the literature for ideas on maintaining nitrogen without overfertilizing (leading to pollution) for my particular system].
Organic agriculture is in fact more efficient because it is much, much lower-input (as far as calories in, calories out go--making organic local all the more important) and is more sustainable because it requires recycling nutrients. So they will use cover crops and manure from a local farm and so forth. In a conventional system, you may do some of this, but you will also take a lot of shortcuts and import inorganic fertilizers from who knows where.

The problem is that so knowledge has been lost since the Green Revolution, which is why research into different organic systems, modified for different environments and needs, is so important. The price premium is also important in this time of transition. Organic farmers work much harder than the majority of people, period, and make much less money. They deserve every cent.