There are severe constraints on the supply side of the provision of infrastructure in Asia. The infrastructure financing gap between what is invested in Asia-Pacific (around US$48 billion) and what is needed (US$228 billion) is around US$180 billion every year.
Placed in the centre of a garden bed, they can be underplanted with low growing shrubs and bulbous plants for an harmonious effect; or underplanted with grass for a contrasting statement. Alternatively, the tree can be situated at the end of a long garden to draw visitors out into the garden.
Re: Citrus sunlight requirement/position in a food forest. Citrus is a understory tree in nature. They do best in full sun for best production, but will do fine in shade. You will find if you plant them in shade they will stretch trying to find full sun. Doing that causes them to become leggy and weak looking.