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.
Soil that is rich in humus has high. fertility. Soil formation would take place most rapidly with the weathering of. limestone in a warm, wet climate. When earthworms add their waters to the soil, then die and decay in the soil, they are contributing to the formation of. humus.