It refers to the materials that the soil is made up of- it's mineral content, it's physical structure and qualities, it's level of fertility, it's ability to retain water, it's vulnerability to erosion, and so forth.
by the topsoil
Earthworms eat the soil, and excrete what they don't digest - leaving tiny piles of 'worm-poop' in the soil. This breaks down and adds to the general composition of the soil.
The general composition of a soil sample will be some sand, some silt, some clay, and some organic matter, plus a certain amount of microbial life, air and (unless it's completely dried out) some water.
One reason is to grow certain types of plants. For example some plants grow well in acidic soil and other grow well in akalyne based soil. If you plant the wrong plants, they won't grow well, or will die within a year or more.
Contour drawing is drawing the outline shape of an object. Composition is the arrangement and organization of the artwork using the elements of art.
Composition means what something is made from, as in "The composition of this soil is sand and loam."
Soil Composition
no, the soil from different places have different composition
soil composition, soil texture, and soil fertility
it means when your hands are covered with dirt and soil
Soil composition
soil, silt, and clay
Soil composition is soil mixed of rock particles, minerals, decayed organic material, water, and air.
compost soil
Variation of soil composition with depth
Soil in general does not have any exact chemical composition; this question could be answered in principle only for a particular sample of soil.
by the topsoil