The fifty cent rheometer-effect of slip,speed of lift and stabilty on yield stress measurement?

Question

THIS IS A COMMUNITY PROJECT IN NIGER DELTA AREA WHICH I AM THE YOUTH LEADER,I WOULD ANSWER TO ENABLE ME ATTAIN TO THE EXPECTATION FROM THE COMMUNITY.
I WANT TO DETERMINE,THE BETTER METHOD USED IN MEASUREING YIELD STRESS,IT IS CORE BECOUSE OUR COMMUNITIES INDUSTRIAL MINE TAILINGS HAS BEEN ONE OF THE ROOT CAUSE OF THE PROBLEMS IN NIGER DELTA REGION OF NIGERIA.
THE ANSWERS WILL GO A LONG WAYS TO AID IN LIMITING THE MISUNDERSTANDINGS,IN NIGER DELTA AND IMPROVE THE ENVIRONMENTAL DEGRADATION AND CONSERVATION OF WATERS WHICH IS USED BY OIL COMPANIES WITHOUT RESERVATIONS.

Answer 1

Tough question