OBJECTIVE FORESTRY

Detailed explanation-1: -Humus is dark, organic material that forms in soil when plant and animal matter decays. When plants drop leaves, twigs, and other material to the ground, it piles up. This material is called leaf litter. When animals die, their remains add to the litter.

Detailed explanation-2: -As the decomposition of dead plant matter and animals occurs, nutrients held within the plant matter or animal are released into the soil. This end result of the decomposition is known as humus. This humus represents up to 1 to 5% of the dry weight of the soil.

Detailed explanation-3: -Humus is a type of soil created from decaying plants and organisms. Coined by a french soil scientist, Muller, the name is derived from the latin word “soil". Humus is difficult to describe and has yet to be fully understood.

Detailed explanation-4: -Soil is the thin layer of material covering the earth’s surface and is formed from the weathering of rocks. It is made up mainly of mineral particles, organic materials, air, water and living organisms-all of which interact slowly yet constantly.