Levi sbottom

Wow. Sorry to all for not checking back earlier I did't expect to receive responses so fast this was my first post to a forum ever. 
Anyways. I am currently slaking the clay soil. Does anyone know if it matters if the clay soil is placed in a bucket and then water added or should I have done the opposite?
Yes to the question about rammed earth I have studied up on it a bit and think it produces a beautiful wall system. 
Ok let me add a bit more info. I am doing the earthen oven in Northern California at my mothers property where I am visiting the actual natural building that this is all leading up to will be done in Ecuador so as of this second don't have test samples of soils for there. But for the oven I do have some photos I can add of shake tests it just might take a bit because I'm traveling while in the states. 
Thanks everyone for having me.

Hello all,
Ok, so I'm building an earthen oven for experience and eventually will be building some sort of natural home most likely a super adobe cob hybrid. That being said I have done my shake tests all they did was give me more questions than answers.  I know I have clay and sand but cannot tell the silt amount so moving on to the test bricks and my question I have already dug my clay soil and it's super chunky and super hard. So I understand that it can be screened and all but I do not see how screening alone will break up the chunks. The small amount that I'm using for the test bricks I am just beating the chunks in a bucket with a tamper like tool and its already a pain so I can't imagine how one would deal with an earth oven let alone a cob house. Please tell me what I am missing
Thanks for any help!!