Inhibition of root and fruit formation are deficiency symptoms of

The deficiency symptom that can inhibit both root and fruit formation is a lack of phosphorus in the plant's soil. Phosphorus is an essential nutrient that plays a vital role in a plant's growth and development. It helps in the formation of strong roots and stimulates the growth of fruits and flowers. When a plant lacks sufficient phosphorus, it can lead to stunted root growth and poor fruit development. In contrast, nitrogen is required for leaf and stem growth, while iron is necessary for chlorophyll synthesis, which gives leaves their green color. Chlorine is important for photosynthesis, but its deficiency symptoms typically manifest as yellowing or wilting of leaves, rather than affecting root and fruit formation.