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].
Actually, thereâs a very good â and scientific â reason for farmers to plant different crops in a field from year to year. Itâs a process known as crop rotation, and itâs actually been around a long, long time. Crop rotation refers to the practice of growing different types of crops (or none at all) in the same area over a sequence of seasons. Historians believe farmers in the Middle East practiced crop rotation as early as 6,000 B.C., although they didn't fully understand the science behind it.