Chemistry of Gardening
List at least 6 elements needed for plant growth
Identify sources of the essential elements
Elements needed for plant growth
Plants need as many as 20 different elements
The three most important are C, H and O
which are obtained from the air in the form of Carbon dioxide and
from the soil in the form of water.
These are readily available to the plant.
These along with six other elements that are required in relatively large amounts are listed below along with their function and deficiency symptoms.
|Nitrogen||For making proteins||Stunted growth|
|Phosphorus||For development of roots especially plants with bulbs||Poor root development leaves and stems get purplish colour|
|Potassium||For flower and fruit development||Stunted growth, easy loss of leaves, flower and fruit|
|Calcium||Structural strength and root growth||Deformity of tips and roots|
|Magnesium||For formation of chlorophyll||Slow growth, older leaves are light green|
|Sulphur||For making protein||Stunted yellowish plants|
Sources of the essential elements
Nitrogen - Nitrogen fixation, humus, urea, ammonium sulphate, excreta
Phosphorus - manure, iron, aluminium phosphates in the soil
Potassium - pig manure, potassium chloride, potassium sulphate, potassium nitrate
Calcium - lime (calcium carbonate), calcium phosphate, calcium sulphate
Magnesium - Magnesium sulphate, magnesium carbonate
Sulphur - Humus, ammonium sulphate, potassium sulphate, magnesium sulphate and calcium sulphate.