The sperm mucus penetration test checks whether a man's sperm can move through the cervical mucus. This test is not done very often because there are other fertility tests that give more information about the fertility problem.
The current system of shifting cultivation can best be described as neo-traditional, composed of modern (colonial) and traditional (pre-colonial) structural elements. It is a locally adapted version of what was introduced by the Belgian Colonial Administration into the Ituri Forest under the heading of paysannat indigÃ¨ne including resettlement schemes and compulsory cultivation [Jurion and Henry 1967].
second source added for Indonesian experience in shifting cultivation, indicating clearly that slash and burn is simply a functional part of some shifting cultivation systems. the slash and burn element varies as a percentage of the shifting cultivation cycle as explained in the Indonesia writeup there. the windup of the cropping part of the shifting cultivation cycle also varies with crop type, leading to different repeat intervals (or no repeat, or fallow plus repeat slash and burn). so ...