Question

The plant ash is an indication of
(A) Organic matter of the plant.
(B) Waste product
(C) Mineral salts absorbed by the plant.
(D) None of the above

Answer 1

Hint: Ash is the residue of burned parts of plants for example bark, wood, leaves, woody debris, pulp, fronds and other plant waste. Using ash in the garden helps to get the trace elements that are important for the healthy growth of a plant.

Complete answer:
Studies from leaching show that plant ash is a time-release fertilizer under natural conditions like moistening, drying, freezing and thawing. Ash has been used for soil liming for years and is also helpful in traditional pest control of some crawling pests.
The ash that is left out after burning the various dry parts of the plant in a container, shows the presence of the mineral salts absorbed by the plant. If dried parts of the plant are kept in a container with a temperature of 600°C, most of the organic substances vaporize and the parts that remain have the presence of inorganic substances or absorbed mineral elements.

From the above discussion, we know that option (B) is our right answer.

Note:
The ash i.e. is made from a hot burn around 300°C releases more nutrients than the ash from light burns around 180°C. While using distilled water and natural precipitation as leaching agents, different amounts of nutrient release is observed.