Question

Helpful material of soil

Answer 1

Answer:

Humus

Explanation:

Humus helps in the growth of plants..

Answer 2

Answer:

Soil creation using materials containing potentially toxic contaminants must take into account their fate, whether in the soil, or beyond it in the vegetation or water flowing through it. In an urban context, soil formation will usually be driven towards creating a soil type that can sustain a particular type of vegetation. Soil-forming and other soil processes should also be considered when managing natural soil materials in urban greenspace schemes, in order to maintain soil sustainability and prevent soil degradation.