Teachers are categorized in four main classes in Bangladesh at University level. The ascending rank of teacher is Lecturer, Assistant Professor, Associate Professor and Professor. The initial position Lecturer is generally enrolled as the top student of the class. Master's degree is required for normal university level Lecturer.
Humus soil is soil made up of decayed organic material. Popularly, it refers to soil that is light in texture, dark brown or black in color, and sweet-smelling.
Humus is the stabilized particles of highly decomposed organic matter. Deep brown in color, humus forms over several years and provides nutrients and soil structure for plant growth.Humus should comprise about 50 percent of garden soil for optimal growth. Soils high in humus and decomposing organic matter are dark brown to black.Humus is dark in color because it has a high mineral content; it can also absorb and drain water. The top two layers of soil are usually highest in organic matter and are darker than lower levels.umus should comprise about 50 percent of garden soil for optimal growth. Soils high in humus and decomposing organic matter are dark brown to black. Humus is dark in color because it has a high mineral content; it can also absorb and drain water.