If you have mostly clay soil and need good drainage for your plantings then yes - and you will need to make the area slope away in wet lands or slope toward the planting area in dry areas.
Installing a pond can be complicated. You'll need to excavate soil, compact the soil and lay down a soil and water barrier, then place the water.
about 60 Cm 1-bad soil ~20 cm 2-for protect of freezing ~60 Cm
How about excavate?
I think it will help to have a proper soil for the foundation to be laid
IT largely depends on the soil nature. On an average, in ordinary clayee soil it can excavate up to 50cum per hour.
of Excavate
Grass fertilization should be done in spring or fall. It is preferable to spread fertilizer before a rain so that it soaks into the soil.
Excavate a hole twice the size of the rootball. Break up the bottom of the hole and incorporate some compost or other fibrous material. Scatter some fertiliser on the loose soil place the holly in the hole so that the soil level is the same as the soil mark on the bush. Fill in the hole and firm the soil down with your feet water well and stake. Keep well watered until you are sure it is growing.
The soil can not deal with a huge amount of matter so to make it easier it breaks it down then the nutrients from they decay flow into the soil.
lime is the powder in order to break down the soil.
The cubic meters of aggregate that a backhaul can excavate in an hour is dependent upon the size of the backhoe. Typically, a backhoe can ask of a 100 cubic meters of aggregate per hour.
removed top soil then put sand down leveled sand tamped it.And your ready to setup pool.