Q1: Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ?

ANS:A - Nitrogeneous fertiliser

The fertiliser needed for promoting the development of leaves and stems during the early stages of plant growth is a nitrogenous fertiliser. Nitrogen is a vital nutrient for plant growth, particularly during the vegetative stage when plants are focusing on leaf and stem development. Nitrogen promotes the formation of chlorophyll, which is essential for photosynthesis and gives leaves their green color. Additionally, nitrogen is involved in protein synthesis, cell division, and the overall growth and development of plant tissues, including stems. Potassic fertilisers provide potassium, which is important for various physiological processes in plants, including enzyme activation, osmoregulation, and water transport. While potassium is essential for overall plant health and plays a role in stem strength and disease resistance, it is not specifically targeted at promoting leaf and stem development during the early stages of growth. Phosphatic fertilisers provide phosphorus, which is essential for energy transfer, root development, and flower and fruit production in plants. While phosphorus is important for overall plant growth and development, it is not primarily responsible for promoting leaf and stem development during the early stages of growth. Therefore, among the options provided, the correct answer is Nitrogeneous fertiliser as it is needed for promoting the development of leaves and stems during the early stages of plant growth.