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.
Adding a layer of soil that is more than 2 inches deep, for example, can reduce moisture and oxygen availabilities and hinder gas exchange to existing roots, causing trees to suffer or even die. A treeâs root system and canopy also determine how easy or difficult it will be to install a garden under a tree.It can be particularly troublesome to work among the extensive surface roots of shallow-rooted trees such as maples (Acer spp. and cvs., Zones 3â9) and elms (Ulmus spp. and cvs., Zones 3â9).dding a layer of soil that is more than 2 inches deep, for example, can reduce moisture and oxygen availabilities and hinder gas exchange to existing roots, causing trees to suffer or even die. A treeâs root system and canopy also determine how easy or difficult it will be to install a garden under a tree.