in order to successfully extract worms from the ground without actually digging them up, you will need the following
water distribution device such as watering can , though i only use a the soap filled bucket (in areas where the ground is not saturated, a watering can is recommended.
a dark cool damp shady spot were worms would like to chill out. this can be everywhere in tropics during monsoonal/wet-seasons
environmentally friendly soap (i use dogs tea tree oil based shampoo) i use about 30-50ml's
a filter of some sorts, an old, but clean rag will do
a bucket to put your worms
a container of some sorts (large bucket ) to mix the soap and water together, MUST NOT BE THE SAME BUCKET YOU PUT YOUR WORMS IN. SOAP IRRITATES WORMS IF THEY STAY IN CONTACT WITH IT FOR A LONG TIME, SO MAKE SURE YOUR WORM BUCKET IS 100% SOAP FREE.
i recommend washing the worm bucket with bicarb soda prior to putting the worms in
* an old beach towel you don't mind getting dirty
must be big