Nibal,
Any point source irrigation is going to be troublesome in representing via our Schematic Irrigation tool, as it is currently designed.
What it needs (and what we do plan for it having in the future), is an ability to control the spacing and percentage fill of the plants. Yet that will then also need the ability to define separately the Trees, Palm Trees, Shrubs, and Groundcovers, if the user was planning on operating them with different valves.
You are better off using our Area for Drip Emitters, which will give you this level of control. When you add an Area for Drip Emitters to your project, you can choose the manufacturer Custom, and enter the lph of your tree bubbler. You will need to use our Planting system to create representative Trees of the varying sizes, and place them. However our placement tools should make this rather easy, especially as you are only concerned with getting the appropriate number of plants placed, their location does not need to be accurate.
The custom Drip Emitter Area can then assign a number of bubblers to each size tree, and will apply that calculation to the trees placed within each placed area.
I hope this technique works for you, please let me know how it goes.
Regards,
--J