5

1
5 x 5 mesh (250 micron mesh) bag sewn on 3 sides
Example 4 x 4 prototype of a BDM material
(actually is a piece of plastic shopping bag)
Hand auger
2
Pic not shown place piece of BDM on top of 200 g
soil
Fill bag with remaining 200g (oven dry
equivalent) field soil on top of BDM piece. Add
small label on special laser printed paper (not
shown).
Fill bag with 200g (oven dry equivalent) field
soil
3
Fold top seam over and staple multiple times to
seal
Attach fishing line and metal rod and bury in
soil (7.5 cm) according to protocol directions
(not shown)