Bio Engineering: Shurbs & Tress Planting

Shurbs & Tress Planting in Bio Engineering

Function:  

To reinforce and anchor the slope in long run.

Any steep, rocky or unstable sites. Direct sowing (up to about 60°) and Broadcasting seeds ( up to 45°)

Specification:

• Suitable for slope 30 to 45 degree.
• Complies combination of tree & shrubs. 

Methods:

• Prepare the site well in advance of planting
• Dig pits of size 300 mm deep and 300 mm in diameter
• Carefully remove the polypot by slicing it down the side with a razor blade
• Plant the seedling in the pit, filling the soil carefully around.
• If available, mix a few handfuls of well-rotted compost and water
• Remove any weeds around the plant

 Limitations:

• Takes almost 5 year to contribute in Bio Engineering
• Need great care against cattle and other factors for 2 years. 

 Example: Bakailo, Areri, Gobre Salla, etc. 

Shurbs & Tree Seeding

"Suitable for any steep, rocky and unstable slope where grass plantation is difficult and seedling can't be planted."

Function: 

• Reinforce & anchor to site

Specification:

• 250 mm spacing between seeds
• Seeding holes shall be just enough to inject/hold seed in it.
• Seeds can be either directly sprayed (broadcast method) or   manually injected and covered with soil (direct seeding method).