SSC MTS EXAM

Detailed explanation-1: -Plants use nitrogen which is present in the soil to prepare proteins. Ammonium taken in by plants is used specifically in proteins. Nitrate is the source of nitrogen most used by growing and developing plants.

Detailed explanation-2: -Plants use nitrogen to produce the necessary protoplasms and amino acids required for the building of plant tissue and plant proteins. Nitrogen is also required to produce enzymes necessary to support various biochemical processes during its life.

Detailed explanation-3: -Ammonium (NH4+) and nitrate (NO3–) are the predominate inorganic forms of nitrogen in soils. Ammonium exists in exchangeable and nonexchangeable forms. Nitrite (NO2) and nitrous oxide (N2O) are present in soil in lesser quantities.

Detailed explanation-4: -Soil is a major source of nutrients needed by plants for growth. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur.