HORTICULTURE

Detailed explanation-1: -A fertiliser is a natural or artificial substance containing chemical elements (such as Nitrogen (N), Phosphorus (P) and Potassium (K)) that improve growth and productiveness of plants. Some synonyms include the terms “enrichment” or “plant nutrient".

Detailed explanation-2: -Auxins, gibberellins and cytokinins are the plant hormones which promote growth of plants.

Detailed explanation-3: -Most fertilizers that are commonly used in agriculture contain the three basic plant nutrients: nitrogen, phosphorus, and potassium. Some fertilizers also contain certain “micronutrients, ‘’ such as zinc and other metals, that are necessary for plant growth.

Detailed explanation-4: -Chemical fertilizers, such as urea, diammonium phosphate (DAP), and single superphosphate (SSP), are used to maintain the shortage of nitrogen, phosphorus, and potassium in the soil.