I think that principles for responsible agricultural investment should be under globalization, health of consumers, producers, environments and profits to stakeholders. In my opinions, principle No1 is opening market mechanism in agriculture sector, where every governments should cut down and remove out their subsidies to the sector.
Why globalization? because, it help agricultural products become goods under kinds of industry and help completion of the sector under comparative advantages like technology, cheap labour sources, natural conditions, etc. And the most important, it will promote agriculture production as well as distribute fresh, safe food and nutrition to consumers with cheapest cost.
Health of consumers and producers, if this is guaranty, I believe that environment will be protected and profits of stakeholders will be ensure.