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].
3. Shifting agriculture: This is a type of agriculture in which a piece of forest land is cleared mainly by tribal people by felling and burning of trees and crops are grown. After 2-3 years when the fertility of the soil in the cleared land decreases, it is abandoned and the tribe shifts to some other piece of land.